diff --git a/.editorconfig b/.editorconfig
index 2733847d..f8256e8a 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -34,7 +34,7 @@ ij_javascript_align_multiline_extends_list = false
 ij_javascript_align_multiline_for = true
 ij_javascript_align_multiline_parameters = true
 ij_javascript_align_multiline_parameters_in_calls = false
-ij_javascript_align_multiline_ternary_operation = false
+ij_javascript_align_multiline_ternary_operation = true
 ij_javascript_align_object_properties = 0
 ij_javascript_align_union_types = false
 ij_javascript_align_var_statements = 0
@@ -218,7 +218,7 @@ ij_typescript_align_multiline_extends_list = false
 ij_typescript_align_multiline_for = true
 ij_typescript_align_multiline_parameters = true
 ij_typescript_align_multiline_parameters_in_calls = false
-ij_typescript_align_multiline_ternary_operation = false
+ij_typescript_align_multiline_ternary_operation = true
 ij_typescript_align_object_properties = 0
 ij_typescript_align_union_types = false
 ij_typescript_align_var_statements = 0
@@ -363,7 +363,7 @@ ij_typescript_ternary_operation_signs_on_next_line = false
 ij_typescript_ternary_operation_wrap = off
 ij_typescript_union_types_wrap = on_every_item
 ij_typescript_use_chained_calls_group_indents = false
-ij_typescript_use_double_quotes = false
+ij_typescript_use_double_quotes = true
 ij_typescript_use_explicit_js_extension = global
 ij_typescript_use_path_mapping = always
 ij_typescript_use_public_modifier = false
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c1b69cb3..a5eed62b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,11 @@
 name: Node.js CI
 
-on: [ push, pull_request ]
+on:
+  pull_request:
+    branches: [ master ]
+    types: [ opened, synchronize, closed ]
+  push:
+    branches: [ master ]
 
 jobs:
   build:
@@ -14,25 +19,13 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Determine Yarn Cache Path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-
-      - uses: actions/cache@v1
-        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
-
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
 
-      - name: Install Packages
-        run: yarn install --frozen-lockfile
+      - name: Install
+        run: yarn run clean:all && yarn install --frozen-lockfile
 
       - name: Build
         run: yarn build
diff --git a/.gitignore b/.gitignore
index 6cfcd46f..f310fc56 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # Yarn
 .yarn-cache
+./test/yarn.lock
 
 # Built
 *.js.map
diff --git a/package.json b/package.json
index 6d66d68e..098bcde2 100755
--- a/package.json
+++ b/package.json
@@ -11,11 +11,11 @@
     "release": "standard-version",
     "--------------": "",
     "format": "prettier --write \"{src,test}/**/{*.js,!(*.d).ts}\"",
-    "clean": "rimraf dist **/*.tsbuildinfo",
-    "clean:all": "yarn run clean && rimraf node_modules test/node_modules test/.yarn-cache",
-    "reset": "yarn run clean:all && yarn install",
+    "clean": "npx rimraf dist **/*.tsbuildinfo",
+    "clean:all": "yarn run clean && npx rimraf node_modules **/node_modules test/.yarn-cache",
+    "reset": "yarn run clean:all && yarn install && yarn build",
     "-------------- ": "",
-    "prebuild": "rimraf dist",
+    "prebuild": "npx rimraf dist",
     "install:tests": "cd test && yarn install && cd projects/extras && yarn install",
     "prepare": "yarn run install:tests"
   },
@@ -58,11 +58,11 @@
     "prettier": "^2.3.2",
     "rimraf": "^3.0.2",
     "standard-version": "^9.3.1",
-    "ts-expose-internals": "^4.3.2",
+    "ts-expose-internals": "^4.4.3",
     "ts-jest": "^27.0.4",
     "ts-node": "^10.1.0",
-    "ts-patch": "^1.4.2",
-    "typescript": "^4.3.5"
+    "ts-patch": "^1.4.4",
+    "typescript": "^4.4.3"
   },
   "peerDependencies": {
     "typescript": ">=3.6.5"
diff --git a/src/transformer.ts b/src/transformer.ts
index 634055c3..d9805932 100755
--- a/src/transformer.ts
+++ b/src/transformer.ts
@@ -18,30 +18,37 @@ function getTsProperties(args: Parameters<typeof transformer>) {
   let tsInstance: typeof ts;
   let compilerOptions: ts.CompilerOptions;
   let fileNames: readonly string[] | undefined;
+  let isTranspileOnly = false;
   let isTsNode = false;
 
-  const { 0: program, 2: extras, 3: manualTransformOptions } = args;
+  const [program, pluginConfig, extras, manualTransformOptions] = args;
 
   tsInstance = extras?.ts ?? ts;
   compilerOptions = manualTransformOptions?.compilerOptions!;
+  const config = {
+    ...pluginConfig,
+    outputMode: pluginConfig?.outputMode === "esm" ? <const>"esm" : <const>"commonjs",
+  };
+
+  const tsNodeProps = getTsNodeRegistrationProperties(tsInstance);
+  if (tsNodeProps) isTsNode = true;
 
   if (program) {
-    compilerOptions ??= program.getCompilerOptions();
+    compilerOptions ??= Object.assign({}, program.getCompilerOptions(), tsNodeProps?.compilerOptions);
   } else if (manualTransformOptions) {
     fileNames = manualTransformOptions.fileNames;
   } else {
-    const tsNodeProps = getTsNodeRegistrationProperties(tsInstance);
     if (!tsNodeProps)
       throw new Error(
         `Cannot transform without a Program, ts-node instance, or manual parameters supplied. ` +
           `Make sure you're using ts-patch or ts-node with transpileOnly.`
       );
-    isTsNode = true;
+    isTranspileOnly = true;
     compilerOptions = tsNodeProps.compilerOptions;
     fileNames = tsNodeProps.fileNames;
   }
 
-  return { tsInstance, compilerOptions, fileNames, isTsNode };
+  return { tsInstance, compilerOptions, fileNames, isTranspileOnly, config, isTsNode };
 }
 
 // endregion
@@ -68,11 +75,12 @@ export default function transformer(
       tsInstance,
       compilerOptions,
       fileNames,
-      isTsNode
+      isTranspileOnly,
+      isTsNode,
+      config
     } = getTsProperties([ program, pluginConfig, transformerExtras, manualTransformOptions ]);
 
     const rootDirs = compilerOptions.rootDirs?.filter(path.isAbsolute);
-    const config: TsTransformPathsConfig = pluginConfig ?? {};
     const getCanonicalFileName = tsInstance.createGetCanonicalFileName(tsInstance.sys.useCaseSensitiveFileNames);
 
     let emitHost = transformationContext.getEmitHost();
@@ -82,13 +90,12 @@ export default function transformer(
           `No EmitHost found and could not determine files to be processed. Please file an issue with a reproduction!`
         );
       emitHost = createSyntheticEmitHost(compilerOptions, tsInstance, getCanonicalFileName, fileNames as string[]);
-    } else if (isTsNode) {
+    } else if (isTranspileOnly) {
       Object.assign(emitHost, { getCompilerOptions: () => compilerOptions });
     }
 
     const { configFile, paths } = compilerOptions;
-    // TODO - Remove typecast when tryParsePatterns is recognized (probably after ts v4.4)
-    const { tryParsePatterns } = tsInstance as any;
+    const tryParsePatterns: typeof ts.tryParsePatterns | undefined = tsInstance.tryParsePatterns;
 
     const tsTransformPathsContext: TsTransformPathsContext = {
       compilerOptions,
@@ -100,6 +107,7 @@ export default function transformer(
       transformationContext,
       tsInstance,
       emitHost,
+      isTranspileOnly,
       isTsNode,
       tsThreeInstance: cast<TypeScriptThree>(tsInstance),
       excludeMatchers: config.exclude?.map((globPattern) => new Minimatch(globPattern, { matchBase: true })),
@@ -108,8 +116,7 @@ export default function transformer(
       pathsPatterns:
         paths &&
         (tryParsePatterns
-          ? // TODO - Remove typecast when pathPatterns is recognized (probably after ts v4.4)
-            (configFile?.configFileSpecs as any)?.pathPatterns || tryParsePatterns(paths)
+          ? configFile?.configFileSpecs?.pathPatterns || tryParsePatterns(paths)
           : tsInstance.getOwnKeys(paths)),
     };
 
diff --git a/src/types.ts b/src/types.ts
index 50826816..408cff1c 100755
--- a/src/types.ts
+++ b/src/types.ts
@@ -3,6 +3,7 @@ import ts, { CompilerOptions, EmitHost, Pattern, SourceFile } from "typescript";
 import { PluginConfig } from "ts-patch";
 import { HarmonyFactory } from "./utils/harmony-factory";
 import { IMinimatch } from "minimatch";
+import { RequireSome } from "./utils";
 
 /* ****************************************************************************************************************** */
 // region: TS Types
@@ -22,6 +23,7 @@ export type ImportOrExportClause = ts.ImportDeclaration["importClause"] | ts.Exp
 export interface TsTransformPathsConfig extends PluginConfig {
   readonly useRootDirs?: boolean;
   readonly exclude?: string[];
+  readonly outputMode?: "commonjs" | "esm";
 }
 
 // endregion
@@ -41,16 +43,17 @@ export interface TsTransformPathsContext {
   readonly tsThreeInstance: TypeScriptThree;
   readonly tsFactory?: ts.NodeFactory;
   readonly program?: ts.Program | tsThree.Program;
-  readonly config: TsTransformPathsConfig;
+  readonly config: RequireSome<TsTransformPathsConfig, "outputMode">;
   readonly compilerOptions: CompilerOptions;
   readonly elisionMap: Map<ts.SourceFile, Map<ImportOrExportDeclaration, ImportOrExportDeclaration>>;
   readonly transformationContext: ts.TransformationContext;
   readonly rootDirs?: string[];
   readonly excludeMatchers: IMinimatch[] | undefined;
   readonly outputFileNamesCache: Map<SourceFile, string>;
-  readonly pathsPatterns: (string | Pattern)[] | undefined;
+  readonly pathsPatterns: readonly (string | Pattern)[] | undefined;
   readonly emitHost: EmitHost;
   readonly isTsNode: boolean;
+  readonly isTranspileOnly: boolean;
 }
 
 export interface VisitorContext extends TsTransformPathsContext {
diff --git a/src/utils/general-utils.ts b/src/utils/general-utils.ts
index 89652cb9..73cba2f5 100755
--- a/src/utils/general-utils.ts
+++ b/src/utils/general-utils.ts
@@ -12,3 +12,5 @@ export const isBaseDir = (baseDir: string, testDir: string): boolean => {
   return relative ? !relative.startsWith("..") && !path.isAbsolute(relative) : true;
 };
 export const maybeAddRelativeLocalPrefix = (p: string) => (p[0] === "." ? p : `./${p}`);
+
+export type RequireSome<T, K extends keyof T> = T & Pick<Required<T>, K>;
diff --git a/src/utils/resolve-module-name.ts b/src/utils/resolve-module-name.ts
index b31158b3..e9e3da05 100755
--- a/src/utils/resolve-module-name.ts
+++ b/src/utils/resolve-module-name.ts
@@ -2,7 +2,7 @@ import { VisitorContext } from "../types";
 import { isBaseDir, isURL, maybeAddRelativeLocalPrefix } from "./general-utils";
 import * as path from "path";
 import { removeFileExtension, removeSuffix, ResolvedModuleFull, SourceFile } from "typescript";
-import { getOutputDirForSourceFile } from "./ts-helpers";
+import { getOutputPathForSourceFile } from "./ts-helpers";
 
 /* ****************************************************************************************************************** */
 // region: Types
@@ -63,9 +63,9 @@ function getPathDetail(moduleName: string, resolvedModule: ResolvedModuleFull) {
   // prettier-ignore
   const indexType =
     implicitPackageIndex ? IndexType.ImplicitPackage :
-      baseNameNoExtension === 'index' && resolvedBaseNameNoExtension === 'index' ? IndexType.Explicit :
-        baseNameNoExtension !== 'index' && resolvedBaseNameNoExtension === 'index' ? IndexType.Implicit :
-          IndexType.NonIndex;
+    baseNameNoExtension === 'index' && resolvedBaseNameNoExtension === 'index' ? IndexType.Explicit :
+    baseNameNoExtension !== 'index' && resolvedBaseNameNoExtension === 'index' ? IndexType.Implicit :
+    IndexType.NonIndex;
 
   if (indexType === IndexType.Implicit) {
     baseName = void 0;
@@ -121,6 +121,7 @@ function getResolvedSourceFile(context: VisitorContext, fileName: string): Sourc
  */
 export function resolveModuleName(context: VisitorContext, moduleName: string): ResolvedModule | undefined {
   const { tsInstance, compilerOptions, sourceFile, config, rootDirs } = context;
+  const useEsmOutput = !context.isDeclarationFile && context.config.outputMode === "esm";
 
   // Attempt to resolve with TS Compiler API
   const { resolvedModule, failedLookupLocations } = tsInstance.resolveModuleName(
@@ -143,18 +144,22 @@ export function resolveModuleName(context: VisitorContext, moduleName: string):
 
   const resolvedSourceFile = getResolvedSourceFile(context, resolvedModule.resolvedFileName);
 
-  const { indexType, resolvedBaseNameNoExtension, resolvedFileName, implicitPackageIndex, extName, resolvedDir } =
-    getPathDetail(moduleName, resolvedModule);
+  const pathDetail = getPathDetail(moduleName, resolvedModule);
+  const { indexType, resolvedBaseNameNoExtension, resolvedFileName, implicitPackageIndex, resolvedDir } = pathDetail;
+  let extName = pathDetail.extName;
 
   /* Determine output filename */
   let outputBaseName = resolvedBaseNameNoExtension ?? "";
 
-  if (indexType === IndexType.Implicit) outputBaseName = outputBaseName.replace(/(\/index$)|(^index$)/, "");
+  const moduleFileOutputPath = getOutputPathForSourceFile(context, resolvedSourceFile);
+  if (useEsmOutput) extName = path.extname(moduleFileOutputPath);
+  else if (indexType === IndexType.Implicit) outputBaseName = outputBaseName.replace(/(\/index$)|(^index$)/, "");
+
   if (outputBaseName && extName) outputBaseName = `${outputBaseName}${extName}`;
 
   /* Determine output dir */
-  let srcFileOutputDir = getOutputDirForSourceFile(context, sourceFile);
-  let moduleFileOutputDir = implicitPackageIndex ? resolvedDir : getOutputDirForSourceFile(context, resolvedSourceFile);
+  let srcFileOutputDir = path.dirname(getOutputPathForSourceFile(context, sourceFile));
+  let moduleFileOutputDir = implicitPackageIndex ? resolvedDir : path.dirname(moduleFileOutputPath);
 
   // Handle rootDirs remapping
   if (config.useRootDirs && rootDirs) {
diff --git a/src/utils/resolve-path-update-node.ts b/src/utils/resolve-path-update-node.ts
index 7fd2181c..f3c9fa1e 100755
--- a/src/utils/resolve-path-update-node.ts
+++ b/src/utils/resolve-path-update-node.ts
@@ -18,6 +18,7 @@ export function resolvePathAndUpdateNode(
   updaterFn: (newPath: ts.StringLiteral) => ts.Node | undefined
 ): ts.Node | undefined {
   const { sourceFile, tsInstance, factory } = context;
+  const { outputMode } = context.config;
   const { normalizePath } = tsInstance;
 
   /* Handle JSDoc statement tags */
@@ -36,7 +37,7 @@ export function resolvePathAndUpdateNode(
 
   /* Resolve Module */
   // Skip if no paths match found
-  if (!isModulePathsMatch(context, moduleName)) return node;
+  if (outputMode !== "esm" && !isModulePathsMatch(context, moduleName)) return node;
 
   const res = resolveModuleName(context, moduleName);
   if (!res) return node;
diff --git a/src/utils/ts-helpers.ts b/src/utils/ts-helpers.ts
index 8c4e9deb..df1d368d 100755
--- a/src/utils/ts-helpers.ts
+++ b/src/utils/ts-helpers.ts
@@ -1,5 +1,4 @@
 import ts, { GetCanonicalFileName, SourceFile } from "typescript";
-import path from "path";
 import { VisitorContext } from "../types";
 import type { REGISTER_INSTANCE } from "ts-node";
 
@@ -10,9 +9,8 @@ import type { REGISTER_INSTANCE } from "ts-node";
 /**
  * Determine output file path for source file
  */
-export function getOutputDirForSourceFile(context: VisitorContext, sourceFile: SourceFile): string {
+export function getOutputPathForSourceFile(context: VisitorContext, sourceFile: SourceFile): string {
   const {
-    tsInstance,
     emitHost,
     outputFileNamesCache,
     compilerOptions,
@@ -34,11 +32,9 @@ export function getOutputDirForSourceFile(context: VisitorContext, sourceFile: S
         `https://github.com/LeDDGroup/typescript-transform-paths/issues`
     );
 
-  const res = path.dirname(outputPath);
+  outputFileNamesCache.set(sourceFile, outputPath);
 
-  outputFileNamesCache.set(sourceFile, res);
-
-  return tsInstance.normalizePath(res);
+  return outputPath;
 }
 
 /**
@@ -49,7 +45,7 @@ export function isModulePathsMatch(context: VisitorContext, moduleName: string):
     pathsPatterns,
     tsInstance: { matchPatternOrExact },
   } = context;
-  return !!(pathsPatterns && matchPatternOrExact(pathsPatterns as readonly string[], moduleName));
+  return !!(pathsPatterns && matchPatternOrExact(pathsPatterns, moduleName));
 }
 
 /**
diff --git a/test/.yarnrc b/test/.yarnrc
deleted file mode 100755
index c5a57595..00000000
--- a/test/.yarnrc
+++ /dev/null
@@ -1 +0,0 @@
---cache-folder .yarn-cache
diff --git a/test/package.json b/test/package.json
index 2952315b..88e47c8f 100755
--- a/test/package.json
+++ b/test/package.json
@@ -5,7 +5,7 @@
     "prepare": "node prepare.js"
   },
   "devDependencies": {
-    "typescript-transform-paths": "link:../src",
+    "typescript-transform-paths": "link:../",
     "ts-expose-internals": "^4.1.2",
     "typescript": "npm:typescript@latest",
     "typescript-three": "npm:typescript@3.6.5",
diff --git a/test/projects/extras/package.json b/test/projects/extras/package.json
index c9d4ede6..5968d6db 100755
--- a/test/projects/extras/package.json
+++ b/test/projects/extras/package.json
@@ -3,6 +3,6 @@
   "name": "@tests/extras",
   "version": "0.0.0",
   "dependencies": {
-    "typescript-transform-paths": "link:../../../"
+    "typescript-transform-paths": "*"
   }
 }
diff --git a/test/projects/general/tsconfig.json b/test/projects/general/tsconfig.json
index 5b773121..132e2028 100644
--- a/test/projects/general/tsconfig.json
+++ b/test/projects/general/tsconfig.json
@@ -16,8 +16,8 @@
     "esModuleInterop": true,
 
     "plugins": [
-      { "transform": "../../src/index.ts" },
-      { "transform": "../../src/index.ts", "afterDeclarations": true }
+      { "transform": "../../../src/index.ts" },
+      { "transform": "../../../src/index.ts", "afterDeclarations": true }
     ]
   }
 }
diff --git a/test/projects/project-ref/package.json b/test/projects/project-ref/package.json
index 7ff64a33..a4602890 100755
--- a/test/projects/project-ref/package.json
+++ b/test/projects/project-ref/package.json
@@ -3,6 +3,6 @@
   "name": "@tests/project-ref",
   "version": "0.0.0",
   "dependencies": {
-    "typescript-transform-paths": "link:../../../"
+    "typescript-transform-paths": "*"
   }
 }
diff --git a/test/projects/project-ref/tsconfig.base.json b/test/projects/project-ref/tsconfig.base.json
index e562473b..b5bd3845 100755
--- a/test/projects/project-ref/tsconfig.base.json
+++ b/test/projects/project-ref/tsconfig.base.json
@@ -13,11 +13,12 @@
       "#b/*": [ "./b/*" ]
     },
     "plugins": [
+      // Note - Paths are relative to one level deeper, due to tsp not resolving from base config dir
       {
-        "transform": "./src/index.ts",
+        "transform": "../../../../src/index.ts",
       },
       {
-        "transform": "./src/index.ts",
+        "transform": "../../../../src/index.ts",
         "afterDeclarations": true
       }
     ]
diff --git a/test/tests/transformer/specific.test.ts b/test/tests/transformer/specific.test.ts
index 9f6f04ad..e6521368 100755
--- a/test/tests/transformer/specific.test.ts
+++ b/test/tests/transformer/specific.test.ts
@@ -1,3 +1,15 @@
+/**
+ * Note: To make debug testing easier, you can use the following environment variables to control what tests run:
+ *
+ *   TS_MODULES     - comma separated string of name fields in `tsModules` (config.ts)
+ *   MODES          - comma separated string of `modes` (see config heading below)
+ *   OUTPUT_MODES   - comma separated string of `outputModes` (see config heading below)
+ *
+ * Example — only test latest TS, using program and ts-node, with outputMode 'esm':
+ *   TS_MODULES=latest;
+ *   MODES=program,ts-node;
+ *   OUTPUT_MODES=esm;
+ */
 // noinspection ES6UnusedImports
 import {} from "ts-expose-internals";
 import * as path from "path";
@@ -18,11 +30,8 @@ import TS from "typescript";
 
 const baseConfig: TsTransformPathsConfig = { exclude: ["**/excluded/**", "excluded-file.*"] };
 
-/* Test Mapping */
 const modes = ["program", "manual", "ts-node"] as const;
-const testConfigs: { label: string; tsInstance: any; mode: typeof modes[number]; tsSpecifier: string }[] = [];
-for (const cfg of tsModules)
-  testConfigs.push(...modes.map((mode) => ({ label: cfg[0], tsInstance: cfg[1], mode, tsSpecifier: cfg[2] })));
+const outputModes = ["[default]", "commonjs", "esm"] as const;
 
 /* File Paths */
 const projectRoot = ts.normalizePath(path.join(projectsPaths, "specific"));
@@ -35,14 +44,68 @@ const typeElisionIndex = ts.normalizePath(path.join(projectRoot, "src/type-elisi
 const subPackagesFile = ts.normalizePath(path.join(projectRoot, "src/sub-packages.ts"));
 const moduleAugmentFile = ts.normalizePath(path.join(projectRoot, "src/module-augment.ts"));
 
+/* ****************************************************************************************************************** *
+ * Setup
+ * ****************************************************************************************************************** */
+
+const testConfigs = (function prepareConfigs() {
+  let { TS_MODULES, MODES, OUTPUT_MODES } = process.env;
+  const opt = {
+    modules: TS_MODULES?.split(",").map((m) => m.trim().toLowerCase()),
+    modes: MODES?.split(",").map((m) => m.trim().toLowerCase()),
+    outputModes: OUTPUT_MODES?.split(",").map((m) => m.trim().toLowerCase()),
+  };
+
+  const cfgTsModules = !opt.modules ? tsModules : tsModules.filter((m) => opt.modules!.includes(m[0].toLowerCase()));
+  const cfgModes = !opt.modes ? modes : modes.filter((m) => opt.modes!.includes(m.toLowerCase()));
+  const cfgOutputModes = !opt.outputModes
+    ? outputModes
+    : outputModes.filter((m) => opt.outputModes!.includes(m.toLowerCase()));
+
+  const res: {
+    label: string;
+    tsInstance: any;
+    mode: typeof modes[number];
+    tsSpecifier: string;
+    config: TsTransformPathsConfig;
+    outputMode: typeof outputModes[number];
+  }[] = [];
+
+  cfgTsModules.forEach((cfg) =>
+    cfgOutputModes.forEach((outputMode) =>
+      res.push(
+        ...cfgModes.map((mode) => ({
+          label: cfg[0],
+          tsInstance: cfg[1],
+          mode,
+          tsSpecifier: cfg[2],
+          config: {
+            ...baseConfig,
+            outputMode: outputMode === "[default]" ? void 0 : outputMode,
+          },
+          outputMode,
+        }))
+      )
+    )
+  );
+
+  return res;
+})();
+
 /* ****************************************************************************************************************** *
  * Types
  * ****************************************************************************************************************** */
 
+interface TransformedMatchesOpt {
+  base?: EmittedFiles[];
+  kind?: ("dts" | "js")[];
+  noEsmFix?: boolean;
+}
+
 declare global {
   namespace jest {
     interface Matchers<R> {
-      transformedMatches(expected: RegExp | string, opt?: { base?: EmittedFiles[]; kind?: ("dts" | "js")[] }): void;
+      transformedMatches(expected: RegExp | string, opt?: TransformedMatchesOpt): void;
     }
   }
 }
@@ -52,194 +115,228 @@ declare global {
  * ****************************************************************************************************************** */
 
 describe(`Specific Tests`, () => {
-  describe.each(testConfigs)(`TypeScript $label - Mode: $mode`, ({ tsInstance, mode, tsSpecifier }) => {
-    const tsVersion = +tsInstance.versionMajorMinor.split(".").slice(0, 2).join("");
-    let normalEmit: EmittedFiles;
-    let rootDirsEmit: EmittedFiles;
-    let skipDts = false;
-
-    beforeAll(() => {
-      switch (mode) {
-        case "program":
-          const program = createTsProgram({
-            tsInstance,
-            tsConfigFile,
-            pluginOptions: {
-              ...baseConfig,
-              useRootDirs: false,
-            },
-          });
-          normalEmit = getEmitResultFromProgram(program);
-
-          const rootDirsProgram = createTsProgram({
-            tsInstance,
-            tsConfigFile,
-            pluginOptions: {
-              ...baseConfig,
-              useRootDirs: true,
-            },
-          });
-          rootDirsEmit = getEmitResultFromProgram(rootDirsProgram);
-          break;
-        case "manual": {
-          skipDts = true;
-          const pcl = tsInstance.getParsedCommandLineOfConfigFile(
-            tsConfigFile,
-            {},
-            <any>tsInstance.sys
-          )! as TS.ParsedCommandLine;
-          normalEmit = getManualEmitResult({ ...baseConfig, useRootDirs: false }, tsInstance, pcl);
-          rootDirsEmit = getManualEmitResult({ ...baseConfig, useRootDirs: true }, tsInstance, pcl);
-          break;
-        }
-        case "ts-node": {
-          const pcl = tsInstance.getParsedCommandLineOfConfigFile(
-            tsConfigFile,
-            {},
-            <any>tsInstance.sys
-          )! as TS.ParsedCommandLine;
-          skipDts = true;
-          normalEmit = getTsNodeEmitResult({ ...baseConfig, useRootDirs: false }, pcl, tsSpecifier);
-          rootDirsEmit = getTsNodeEmitResult({ ...baseConfig, useRootDirs: true }, pcl, tsSpecifier);
+  describe.each(testConfigs)(
+    `TypeScript $label - Mode: $mode - OutputMode: $outputMode`,
+    ({ tsInstance, mode, tsSpecifier, config, outputMode }) => {
+      const tsVersion = +tsInstance.versionMajorMinor.split(".").slice(0, 2).join("");
+      let normalEmit: EmittedFiles;
+      let rootDirsEmit: EmittedFiles;
+      let skipDts = false;
+
+      beforeAll(() => {
+        switch (mode) {
+          case "program":
+            const program = createTsProgram({
+              tsInstance,
+              tsConfigFile,
+              pluginOptions: {
+                ...config,
+                useRootDirs: false,
+              },
+            });
+            normalEmit = getEmitResultFromProgram(program);
+
+            const rootDirsProgram = createTsProgram({
+              tsInstance,
+              tsConfigFile,
+              pluginOptions: {
+                ...config,
+                useRootDirs: true,
+              },
+            });
+            rootDirsEmit = getEmitResultFromProgram(rootDirsProgram);
+            break;
+          case "manual": {
+            skipDts = true;
+            const pcl = tsInstance.getParsedCommandLineOfConfigFile(
+              tsConfigFile,
+              {},
+              <any>tsInstance.sys
+            )! as TS.ParsedCommandLine;
+            normalEmit = getManualEmitResult({ ...config, useRootDirs: false }, tsInstance, pcl);
+            rootDirsEmit = getManualEmitResult({ ...config, useRootDirs: true }, tsInstance, pcl);
+            break;
+          }
+          case "ts-node": {
+            const pcl = tsInstance.getParsedCommandLineOfConfigFile(
+              tsConfigFile,
+              {},
+              <any>tsInstance.sys
+            )! as TS.ParsedCommandLine;
+            skipDts = true;
+            normalEmit = getTsNodeEmitResult({ ...config, useRootDirs: false }, pcl, tsSpecifier);
+            rootDirsEmit = getTsNodeEmitResult({ ...config, useRootDirs: true }, pcl, tsSpecifier);
+          }
         }
-      }
-
-      expect.extend({
-        transformedMatches(
-          fileName: string,
-          expected: RegExp | string,
-          opt?: { base?: EmittedFiles[]; kind?: ("dts" | "js")[] }
-        ) {
-          const bases = opt?.base ?? [normalEmit, rootDirsEmit];
-          const kinds = (opt?.kind ?? ["dts", "js"]).filter((k) => !skipDts || k !== "dts");
-
-          let failed: boolean = false;
-          const messages: string[] = [];
-          for (const base of bases) {
-            for (const kind of kinds) {
-              const content = base[fileName][kind];
-              const isValid = typeof expected === "string" ? content.indexOf(expected) >= 0 : expected.test(content);
-              if (!isValid) {
-                failed = true;
-                messages.push(
-                  `File: ${fileName}\nKind: ${kind}\nrootDirs: ${base === normalEmit}\n\n` +
-                    `Expected: \`${expected}\`\nReceived:\n\t${content.replace(/(\r?\n)+/g, "$1\t")}`
-                );
+
+        expect.extend({
+          transformedMatches(fileName: string, expected: RegExp | string, opt?: TransformedMatchesOpt) {
+            const bases = opt?.base ?? [normalEmit, rootDirsEmit];
+            const kinds = (opt?.kind ?? ["dts", "js"]).filter((k) => !skipDts || k !== "dts");
+
+            let failed: boolean = false;
+            const messages: string[] = [];
+            for (const base of bases) {
+              for (const kind of kinds) {
+                const content = base[fileName][kind];
+                const exp = getExpected(kind);
+                const isValid = typeof exp === "string" ? content.indexOf(exp) >= 0 : exp.test(content);
+                if (!isValid) {
+                  failed = true;
+                  messages.push(
+                    `File: ${fileName}\nKind: ${kind}\nrootDirs: ${base === normalEmit}\n\n` +
+                      `Expected: \`${exp}\`\nReceived:\n\t${content.replace(/(\r?\n)+/g, "$1\t")}`
+                  );
+                }
               }
             }
-          }
 
-          return { message: () => messages.join("\n\n"), pass: !failed };
-        },
+            return { message: () => messages.join("\n\n"), pass: !failed };
+
+            function getExpected(kind: "dts" | "js") {
+              if (!(expected instanceof RegExp) && !opt?.noEsmFix && kind === "js" && outputMode === "esm") {
+                const regEx = /"\.(.+?)"/g;
+                let res: string = "";
+
+                let match: RegExpExecArray | null;
+                let lastIndex = 0;
+                while ((match = regEx.exec(expected)) !== null) {
+                  let p = match[1];
+                  if (!path.extname(p)) p += ".js";
+                  res += expected.slice(lastIndex, match.index) + `".${p}"`;
+                  lastIndex = res.length;
+                }
+
+                return res;
+              }
+
+              return expected;
+            }
+          },
+        });
+      });
+
+      describe(`Options`, () => {
+        test(`(useRootDirs: true) Re-maps for rootDirs`, () => {
+          expect(genFile).transformedMatches(`import "./src-file"`, { base: [rootDirsEmit] });
+          expect(srcFile).transformedMatches(`import "./gen-file"`, { base: [rootDirsEmit] });
+          expect(indexFile).transformedMatches(`export { b } from "./dir/gen-file"`, { base: [rootDirsEmit] });
+          expect(indexFile).transformedMatches(`export { a } from "./dir/src-file"`, { base: [rootDirsEmit] });
+        });
+
+        test(`(useRootDirs: false) Ignores rootDirs`, () => {
+          expect(genFile).transformedMatches(`import "../../src/dir/src-file"`, { base: [normalEmit] });
+          expect(srcFile).transformedMatches(`import "../../generated/dir/gen-file"`, { base: [normalEmit] });
+          expect(indexFile).transformedMatches(`export { b } from "../generated/dir/gen-file"`, { base: [normalEmit] });
+          expect(indexFile).transformedMatches(`export { a } from "./dir/src-file"`, { base: [normalEmit] });
+        });
+
+        test(`(exclude) Doesn't transform for exclusion patterns`, () => {
+          expect(indexFile).transformedMatches(
+            /export { bb } from "#exclusion\/ex";\s*export { dd } from "#root\/excluded-file"/
+          );
+        });
       });
-    });
-
-    describe(`Options`, () => {
-      test(`(useRootDirs: true) Re-maps for rootDirs`, () => {
-        expect(genFile).transformedMatches(`import "./src-file"`, { base: [rootDirsEmit] });
-        expect(srcFile).transformedMatches(`import "./gen-file"`, { base: [rootDirsEmit] });
-        expect(indexFile).transformedMatches(`export { b } from "./dir/gen-file"`, { base: [rootDirsEmit] });
-        expect(indexFile).transformedMatches(`export { a } from "./dir/src-file"`, { base: [rootDirsEmit] });
+
+      describe(`Tags`, () => {
+        test(`(@no-transform-path) Doesn't transform path`, () => {
+          for (let i = 1; i <= 4; i++)
+            expect(tagFile).transformedMatches(`import * as skipTransform${i} from "#root\/index`);
+        });
+
+        test(`(@transform-path) Transforms path with explicit value`, () => {
+          expect(tagFile).transformedMatches(`import * as explicitTransform1 from "./dir/src-file"`, {
+            noEsmFix: true,
+          });
+          expect(tagFile).transformedMatches(`import * as explicitTransform2 from "http://www.go.com/react.js"`);
+          expect(tagFile).transformedMatches(`import * as explicitTransform3 from "./dir/src-file"`, {
+            noEsmFix: true,
+          });
+          expect(tagFile).transformedMatches(`import * as explicitTransform4 from "http://www.go.com/react.js"`);
+        });
       });
 
-      test(`(useRootDirs: false) Ignores rootDirs`, () => {
-        expect(genFile).transformedMatches(`import "../../src/dir/src-file"`, { base: [normalEmit] });
-        expect(srcFile).transformedMatches(`import "../../generated/dir/gen-file"`, { base: [normalEmit] });
-        expect(indexFile).transformedMatches(`export { b } from "../generated/dir/gen-file"`, { base: [normalEmit] });
-        expect(indexFile).transformedMatches(`export { a } from "./dir/src-file"`, { base: [normalEmit] });
+      (mode === "program" ? test : test.skip)(`Type elision works properly`, () => {
+        expect(typeElisionIndex).transformedMatches(
+          outputMode === "esm"
+            ? /import { ConstB } from "\.\/a\.js";\s*export { ConstB };/
+            : /import { ConstB } from "\.\/a";\s*export { ConstB };/,
+          { kind: ["js"] }
+        );
+        expect(typeElisionIndex).transformedMatches(
+          /import { ConstB, TypeA } from "\.\/a";\s*import { TypeA as TypeA2 } from "\.\/a";\s*export { ConstB, TypeA };\s*export { TypeA2 };/,
+          { kind: ["dts"] }
+        );
       });
 
-      test(`(exclude) Doesn't transform for exclusion patterns`, () => {
+      (!skipDts && tsVersion >= 38 ? test : test.skip)(`Import type-only transforms`, () => {
+        expect(indexFile).transformedMatches(`import type { A as ATypeOnly } from "./dir/src-file"`, { kind: ["dts"] });
+      });
+
+      test(`Copies comments in async import`, () => {
+        expect(indexFile).transformedMatches(`import(/* webpackChunkName: "Comment" */ "./dir/src-file");`, {
+          kind: ["js"],
+        });
         expect(indexFile).transformedMatches(
-          /export { bb } from "#exclusion\/ex";\s*export { dd } from "#root\/excluded-file"/
+          /\/\/ comment 1\r?\n\s*\r?\n\/\*\r?\n\s*comment 2\r?\n\s*\*\/\r?\n\s*"\.\/dir\/src-file(\.js)?"/,
+          { kind: ["js"] }
         );
       });
-    });
 
-    describe(`Tags`, () => {
-      test(`(@no-transform-path) Doesn't transform path`, () => {
-        for (let i = 1; i <= 4; i++)
-          expect(tagFile).transformedMatches(`import * as skipTransform${i} from "#root\/index`);
+      test(`Preserves explicit extensions`, () => {
+        expect(indexFile).transformedMatches(`export { JsonValue } from "./data.json"`);
+        expect(indexFile).transformedMatches(`export { GeneralConstA } from "./general"`);
+        expect(indexFile).transformedMatches(`export { GeneralConstB } from "./general.js"`);
       });
 
-      test(`(@transform-path) Transforms path with explicit value`, () => {
-        expect(tagFile).transformedMatches(`import * as explicitTransform1 from "./dir/src-file"`);
-        expect(tagFile).transformedMatches(`import * as explicitTransform2 from "http://www.go.com/react.js"`);
-        expect(tagFile).transformedMatches(`import * as explicitTransform3 from "./dir/src-file"`);
-        expect(tagFile).transformedMatches(`import * as explicitTransform4 from "http://www.go.com/react.js"`);
+      test(`Properly handles implicit index filenames`, () => {
+        const implicitMatch = `export { ConstB } from "./type-elision"`;
+        const explicitMatch = `export { ConstB } from "./type-elision/index.js"`;
+
+        expect(indexFile).transformedMatches(outputMode === "esm" ? explicitMatch : implicitMatch, { kind: ["js"] });
+        expect(indexFile).transformedMatches(implicitMatch, { kind: ["dts"] });
       });
-    });
 
-    (mode === "program" ? test : test.skip)(`Type elision works properly`, () => {
-      expect(typeElisionIndex).transformedMatches(/import { ConstB } from "\.\/a";\s*export { ConstB };/, {
-        kind: ["js"],
+      test(`Resolves sub-modules properly`, () => {
+        const a = {
+          js: `export { packageAConst } from "./packages/pkg-a"`,
+          full: `export { packageAConst, PackageAType } from "./packages/pkg-a"`,
+        };
+        const b = {
+          js: `export { packageBConst } from "./packages/pkg-b"`,
+          full: `export { packageBConst, PackageBType } from "./packages/pkg-b"`,
+        };
+        const c = {
+          js: `export { packageCConst } from "./packages/pkg-c"`,
+          full: `export { packageCConst, PackageCType } from "./packages/pkg-c"`,
+        };
+        const sub = {
+          js: `export { subPackageConst } from "./packages/pkg-a/sub-pkg"`,
+          full: `export { SubPackageType, subPackageConst } from "./packages/pkg-a/sub-pkg"`,
+        };
+
+        for (const exp of [a, b, c, sub]) {
+          expect(subPackagesFile).transformedMatches(mode !== "program" ? exp.full : exp.js, {
+            kind: ["js"],
+            noEsmFix: true,
+          });
+          if (!skipDts) expect(subPackagesFile).transformedMatches(exp.full, { kind: ["dts"] });
+        }
+
+        expect(subPackagesFile).transformedMatches(`export { packageCConst as C2 } from "./packages/pkg-c/main"`);
+        expect(subPackagesFile).transformedMatches(`export { packageCConst as C3 } from "./packages/pkg-c/main.js"`);
+        expect(subPackagesFile).transformedMatches(
+          `export { subPackageConst as C4 } from "./packages/pkg-a/sub-pkg/main"`
+        );
+        expect(subPackagesFile).transformedMatches(
+          `export { subPackageConst as C5 } from "./packages/pkg-a/sub-pkg/main.js"`
+        );
       });
-      expect(typeElisionIndex).transformedMatches(
-        /import { ConstB, TypeA } from "\.\/a";\s*import { TypeA as TypeA2 } from "\.\/a";\s*export { ConstB, TypeA };\s*export { TypeA2 };/,
-        { kind: ["dts"] }
-      );
-    });
-
-    (!skipDts && tsVersion >= 38 ? test : test.skip)(`Import type-only transforms`, () => {
-      expect(indexFile).transformedMatches(`import type { A as ATypeOnly } from "./dir/src-file"`, { kind: ["dts"] });
-    });
-
-    test(`Copies comments in async import`, () => {
-      expect(indexFile).transformedMatches(`import(/* webpackChunkName: "Comment" */ "./dir/src-file");`, {
-        kind: ["js"],
+
+      (!skipDts ? test : test.skip)(`Resolves module augmentation`, () => {
+        expect(moduleAugmentFile).transformedMatches(`declare module "./general" {`, { kind: ["dts"] });
+        expect(moduleAugmentFile).transformedMatches(`declare module "./excluded-file" {`, { kind: ["dts"] });
       });
-      expect(indexFile).transformedMatches(
-        /\/\/ comment 1\r?\n\s*\r?\n\/\*\r?\n\s*comment 2\r?\n\s*\*\/\r?\n\s*"\.\/dir\/src-file"/,
-        { kind: ["js"] }
-      );
-    });
-
-    test(`Preserves explicit extensions`, () => {
-      expect(indexFile).transformedMatches(`export { JsonValue } from "./data.json"`);
-      expect(indexFile).transformedMatches(`export { GeneralConstA } from "./general"`);
-      expect(indexFile).transformedMatches(`export { GeneralConstB } from "./general.js"`);
-    });
-
-    test(`Does not output implicit index filenames`, () => {
-      expect(indexFile).transformedMatches(`export { ConstB } from "./type-elision"`);
-    });
-
-    test(`Resolves sub-modules properly`, () => {
-      const a = {
-        js: `export { packageAConst } from "./packages/pkg-a"`,
-        full: `export { packageAConst, PackageAType } from "./packages/pkg-a"`,
-      };
-      const b = {
-        js: `export { packageBConst } from "./packages/pkg-b"`,
-        full: `export { packageBConst, PackageBType } from "./packages/pkg-b"`,
-      };
-      const c = {
-        js: `export { packageCConst } from "./packages/pkg-c"`,
-        full: `export { packageCConst, PackageCType } from "./packages/pkg-c"`,
-      };
-      const sub = {
-        js: `export { subPackageConst } from "./packages/pkg-a/sub-pkg"`,
-        full: `export { SubPackageType, subPackageConst } from "./packages/pkg-a/sub-pkg"`,
-      };
-
-      for (const exp of [a, b, c, sub]) {
-        expect(subPackagesFile).transformedMatches(mode !== "program" ? exp.full : exp.js, { kind: ["js"] });
-        if (!skipDts) expect(subPackagesFile).transformedMatches(exp.full, { kind: ["dts"] });
-      }
-
-      expect(subPackagesFile).transformedMatches(`export { packageCConst as C2 } from "./packages/pkg-c/main"`);
-      expect(subPackagesFile).transformedMatches(`export { packageCConst as C3 } from "./packages/pkg-c/main.js"`);
-      expect(subPackagesFile).transformedMatches(
-        `export { subPackageConst as C4 } from "./packages/pkg-a/sub-pkg/main"`
-      );
-      expect(subPackagesFile).transformedMatches(
-        `export { subPackageConst as C5 } from "./packages/pkg-a/sub-pkg/main.js"`
-      );
-    });
-
-    (!skipDts ? test : test.skip)(`Resolves module augmentation`, () => {
-      expect(moduleAugmentFile).transformedMatches(`declare module "./general" {`, { kind: ["dts"] });
-      expect(moduleAugmentFile).transformedMatches(`declare module "./excluded-file" {`, { kind: ["dts"] });
-    });
-  });
+    }
+  );
 });
diff --git a/test/yarn.lock b/test/yarn.lock
deleted file mode 100755
index 91932f59..00000000
--- a/test/yarn.lock
+++ /dev/null
@@ -1,242 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-ansi-regex@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.0.tgz#388539f55179bf39339c81af30a654d69f87cb75"
-  integrity sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==
-
-ansi-styles@^4.1.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-4.3.0.tgz#edd803628ae71c04c85ae7a0906edad34b648937"
-  integrity sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==
-  dependencies:
-    color-convert "^2.0.1"
-
-balanced-match@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
-  integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
-
-brace-expansion@^1.1.7:
-  version "1.1.11"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
-  integrity sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==
-  dependencies:
-    balanced-match "^1.0.0"
-    concat-map "0.0.1"
-
-chalk@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.0.tgz#4e14870a618d9e2edd97dd8345fd9d9dc315646a"
-  integrity sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==
-  dependencies:
-    ansi-styles "^4.1.0"
-    supports-color "^7.1.0"
-
-color-convert@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-2.0.1.tgz#72d3a68d598c9bdb3af2ad1e84f21d896abd4de3"
-  integrity sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==
-  dependencies:
-    color-name "~1.1.4"
-
-color-name@~1.1.4:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
-  integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
-
-concat-map@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
-  integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
-
-fs.realpath@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
-  integrity sha1-FQStJSMVjKpA20onh8sBQRmU6k8=
-
-function-bind@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
-  integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
-
-glob@^7.0.0:
-  version "7.1.6"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
-  integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.4"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
-global-prefix@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/global-prefix/-/global-prefix-3.0.0.tgz#fc85f73064df69f50421f47f883fe5b913ba9b97"
-  integrity sha512-awConJSVCHVGND6x3tmMaKcQvwXLhjdkmomy2W+Goaui8YPgYgXJZewhg3fWC+DlfqqQuWg8AwqjGTD2nAPVWg==
-  dependencies:
-    ini "^1.3.5"
-    kind-of "^6.0.2"
-    which "^1.3.1"
-
-has-flag@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-4.0.0.tgz#944771fd9c81c81265c4d6941860da06bb59479b"
-  integrity sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==
-
-has@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
-  integrity sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==
-  dependencies:
-    function-bind "^1.1.1"
-
-inflight@^1.0.4:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
-  integrity sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=
-  dependencies:
-    once "^1.3.0"
-    wrappy "1"
-
-inherits@2:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
-  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
-
-ini@^1.3.5:
-  version "1.3.5"
-  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
-  integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
-
-interpret@^1.0.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.4.0.tgz#665ab8bc4da27a774a40584e812e3e0fa45b1a1e"
-  integrity sha512-agE4QfB2Lkp9uICn7BAqoscw4SZP9kTE2hxiFI3jBPmXJfdqiahTbUuKGsMoN2GtqL9AxhYioAcVvgsb1HvRbA==
-
-is-core-module@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.1.0.tgz#a4cc031d9b1aca63eecbd18a650e13cb4eeab946"
-  integrity sha512-YcV7BgVMRFRua2FqQzKtTDMz8iCuLEyGKjr70q8Zm1yy2qKcurbFEd79PAdHV77oL3NrAaOVQIbMmiHQCHB7ZA==
-  dependencies:
-    has "^1.0.3"
-
-isexe@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
-  integrity sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=
-
-kind-of@^6.0.2:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.3.tgz#07c05034a6c349fa06e24fa35aa76db4580ce4dd"
-  integrity sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==
-
-minimatch@^3.0.4:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
-  integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
-  dependencies:
-    brace-expansion "^1.1.7"
-
-minimist@^1.2.5:
-  version "1.2.5"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
-  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
-
-once@^1.3.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
-  integrity sha1-WDsap3WWHUsROsF9nFC6753Xa9E=
-  dependencies:
-    wrappy "1"
-
-path-is-absolute@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
-  integrity sha1-F0uSaHNVNP+8es5r9TpanhtcX18=
-
-path-parse@^1.0.6:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
-  integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
-
-rechoir@^0.6.2:
-  version "0.6.2"
-  resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.6.2.tgz#85204b54dba82d5742e28c96756ef43af50e3384"
-  integrity sha1-hSBLVNuoLVdC4oyWdW70OvUOM4Q=
-  dependencies:
-    resolve "^1.1.6"
-
-resolve@^1.1.6:
-  version "1.19.0"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.19.0.tgz#1af5bf630409734a067cae29318aac7fa29a267c"
-  integrity sha512-rArEXAgsBG4UgRGcynxWIWKFvh/XZCcS8UJdHhwy91zwAvCZIbcs+vAbflgBnNjYMs/i/i+/Ux6IZhML1yPvxg==
-  dependencies:
-    is-core-module "^2.1.0"
-    path-parse "^1.0.6"
-
-shelljs@^0.8.4:
-  version "0.8.4"
-  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.4.tgz#de7684feeb767f8716b326078a8a00875890e3c2"
-  integrity sha512-7gk3UZ9kOfPLIAbslLzyWeGiEqx9e3rxwZM0KE6EL8GlGwjym9Mrlx5/p33bWTu9YG6vcS4MBxYZDHYr5lr8BQ==
-  dependencies:
-    glob "^7.0.0"
-    interpret "^1.0.0"
-    rechoir "^0.6.2"
-
-strip-ansi@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-6.0.0.tgz#0b1571dd7669ccd4f3e06e14ef1eed26225ae532"
-  integrity sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==
-  dependencies:
-    ansi-regex "^5.0.0"
-
-supports-color@^7.1.0:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-7.2.0.tgz#1b7dcdcb32b8138801b3e478ba6a51caa89648da"
-  integrity sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==
-  dependencies:
-    has-flag "^4.0.0"
-
-ts-expose-internals@^4.1.2:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/ts-expose-internals/-/ts-expose-internals-4.1.2.tgz#c89a64be5b7ae6634d2f0f25dffa798e2931d136"
-  integrity sha512-J5xYsQocO5tjP2UMkGlOb5U+joore0AiL1drA5bMPganlQR/9gPmQVO55pQDeHVfy8OATqZaBT5JweyjI6f3eA==
-
-"ts-patch@link:../node_modules/ts-patch":
-  version "0.0.0"
-  uid ""
-
-"typescript-three@npm:typescript@3.6.5":
-  version "3.6.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.6.5.tgz#dae20114a7b4ff4bd642db9c8c699f2953e8bbdb"
-  integrity sha512-BEjlc0Z06ORZKbtcxGrIvvwYs5hAnuo6TKdNFL55frVDlB+na3z5bsLhFaIxmT+dPWgBIjMo6aNnTOgHHmHgiQ==
-
-"typescript-transform-paths@link:..":
-  version "0.0.0"
-  uid ""
-
-"typescript-transform-paths@link:../src":
-  version "0.0.0"
-  uid ""
-
-"typescript@npm:typescript@latest":
-  version "4.3.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
-  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
-
-which@^1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
-  integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==
-  dependencies:
-    isexe "^2.0.0"
-
-wrappy@1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
-  integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
diff --git a/types/index.d.ts b/types/index.d.ts
index 0d8eddb1..67aef4ad 100755
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -8,9 +8,7 @@ import ts from 'typescript'
 export interface TsTransformPathsConfig {
   readonly useRootDirs?: boolean;
   readonly exclude?: string[];
-  readonly afterDeclarations?: boolean;
-  readonly tsConfig?: string;
-  readonly transform?: string
+  readonly outputMode?: 'commonjs' | 'esm'
 }
 
 export interface TransformerExtras {
diff --git a/yarn.lock b/yarn.lock
index 16b40e9e..4b622de8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1827,7 +1827,7 @@ glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.1.4:
+glob@^7.1.4, glob@^7.1.7:
   version "7.1.7"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.7.tgz#3b193e9233f01d42d0b3f78294bbeeb418f94a90"
   integrity sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==
@@ -3637,10 +3637,10 @@ trim-off-newlines@^1.0.0:
   resolved "https://registry.yarnpkg.com/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz#9f9ba9d9efa8764c387698bcbfeb2c848f11adb3"
   integrity sha1-n5up2e+odkw4dpi8v+sshI8RrbM=
 
-ts-expose-internals@^4.3.2:
-  version "4.3.2"
-  resolved "https://registry.yarnpkg.com/ts-expose-internals/-/ts-expose-internals-4.3.2.tgz#99ea3fd7b2b0750e994143c20fe269a5d434dee1"
-  integrity sha512-QqBZDp8fOVFW+/+taGQXx6K/gmU+/Zs9yLxcZcrMObHhmvqBzuImjIU7ZTY/HfcZStO2eXWtJrIlFNjepCV1ew==
+ts-expose-internals@^4.4.3:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/ts-expose-internals/-/ts-expose-internals-4.4.3.tgz#02cd43988403b35d266ac69bf5bee02a885093f4"
+  integrity sha512-hvdD6g3aOdh6vnTMBpKfy+mfG4uTxN7aq5PYC1/s0MCqEKY3+1QD0o1yEgafIGzp9Bi4k7ciaB/lPWV8s55xTQ==
 
 ts-jest@^27.0.4:
   version "27.0.4"
@@ -3674,14 +3674,16 @@ ts-node@^10.1.0:
     source-map-support "^0.5.17"
     yn "3.1.1"
 
-ts-patch@^1.4.2:
-  version "1.4.2"
-  resolved "https://registry.yarnpkg.com/ts-patch/-/ts-patch-1.4.2.tgz#2b763dc1de5a24631062844735ca169821c2c604"
-  integrity sha512-Nj3mjvQM3t8cB4wGfLKeE8zBT+cx1mDjttOcx9nb2fEl6Q/5u79w19tQniv2eLmeYEbki/+wdQc0zszPEpOxOg==
+ts-patch@^1.4.4:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/ts-patch/-/ts-patch-1.4.4.tgz#c4814af4ab36183ddcf04c178f0153ce6ef48245"
+  integrity sha512-b0CxxrkrCGsD22gl5BtSFlXzyTFP2mbOVffxMOWRrwdSh37sM01wzxSY4wlbBiHHHAJICmaaDgESzJ8lKkVoZA==
   dependencies:
     chalk "^4.1.0"
+    glob "^7.1.7"
     global-prefix "^3.0.0"
     minimist "^1.2.5"
+    resolve "^1.20.0"
     shelljs "^0.8.4"
     strip-ansi "^6.0.0"
 
@@ -3734,10 +3736,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^4.3.5:
-  version "4.3.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
-  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
+typescript@^4.4.3:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.4.3.tgz#bdc5407caa2b109efd4f82fe130656f977a29324"
+  integrity sha512-4xfscpisVgqqDfPaJo5vkd+Qd/ItkoagnHpufr+i2QCHBsNYp+G7UAoyFl8aPtx879u38wPV65rZ8qbGZijalA==
 
 uglify-js@^3.1.4:
   version "3.13.5"