diff --git a/lib/pip.js b/lib/pip.js
index 14864794..ea969c4f 100644
--- a/lib/pip.js
+++ b/lib/pip.js
@@ -7,6 +7,7 @@ const { spawnSync } = require('child_process');
 const { quote } = require('shell-quote');
 const { buildImage, getBindPath, getDockerUid } = require('./docker');
 const { getStripCommand, getStripMode, deleteFiles } = require('./slim');
+const { isPoetryProject } = require('./poetry');
 const {
   checkForAndDeleteMaxCacheVersions,
   sha256Path,
@@ -62,7 +63,9 @@ function generateRequirementsFile(
 ) {
   if (
     options.usePoetry &&
-    fse.existsSync(path.join(servicePath, 'pyproject.toml'))
+    fse.existsSync(
+      path.join(servicePath, 'pyproject.toml') && isPoetryProject(servicePath)
+    )
   ) {
     filterRequirementsFile(
       path.join(servicePath, '.serverless/requirements.txt'),
@@ -442,7 +445,9 @@ function copyVendors(vendorFolder, targetFolder, serverless) {
 function requirementsFileExists(servicePath, options, fileName) {
   if (
     options.usePoetry &&
-    fse.existsSync(path.join(servicePath, 'pyproject.toml'))
+    fse.existsSync(
+      path.join(servicePath, 'pyproject.toml') && isPoetryProject(servicePath)
+    )
   ) {
     return true;
   }
diff --git a/lib/poetry.js b/lib/poetry.js
index 7f041c83..9bf0424c 100644
--- a/lib/poetry.js
+++ b/lib/poetry.js
@@ -90,4 +90,4 @@ function isPoetryProject(servicePath) {
   return false;
 }
 
-module.exports = { pyprojectTomlToRequirements };
+module.exports = { pyprojectTomlToRequirements, isPoetryProject };
diff --git a/test.js b/test.js
index 59cb6a76..c924e141 100644
--- a/test.js
+++ b/test.js
@@ -748,6 +748,16 @@ test('non build pyproject.toml uses requirements.txt', t => {
   t.end();
 });
 
+test('non poetry pyproject.toml without requirements.txt packages handler only', t => {
+  process.chdir('tests/non_poetry_pyproject');
+  const path = npm(['pack', '../..']);
+  npm(['i', path]);
+  sls(['package']);
+  const zipfiles = listZipFiles('.serverless/sls-py-req-test.zip');
+  t.true(zipfiles.includes(`handler.py`), 'handler is packaged');
+  t.end();
+});
+
 test('poetry py3.6 can package flask with default options', t => {
   process.chdir('tests/poetry');
   const path = npm(['pack', '../..']);
diff --git a/tests/non_poetry_pyproject/.gitignore b/tests/non_poetry_pyproject/.gitignore
new file mode 100644
index 00000000..3c2369dc
--- /dev/null
+++ b/tests/non_poetry_pyproject/.gitignore
@@ -0,0 +1,22 @@
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Serverless
+.serverless
+.requirements
+unzip_requirements.py
diff --git a/tests/non_poetry_pyproject/handler.py b/tests/non_poetry_pyproject/handler.py
new file mode 100644
index 00000000..5e2e67ff
--- /dev/null
+++ b/tests/non_poetry_pyproject/handler.py
@@ -0,0 +1,5 @@
+import requests
+
+
+def hello(event, context):
+    return requests.get('https://httpbin.org/get').json()
diff --git a/tests/non_poetry_pyproject/package.json b/tests/non_poetry_pyproject/package.json
new file mode 100644
index 00000000..752c49c6
--- /dev/null
+++ b/tests/non_poetry_pyproject/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "serverless-python-requirements": "file:serverless-python-requirements-5.1.0.tgz"
+  }
+}
diff --git a/tests/non_poetry_pyproject/pyproject.toml b/tests/non_poetry_pyproject/pyproject.toml
new file mode 100644
index 00000000..41932632
--- /dev/null
+++ b/tests/non_poetry_pyproject/pyproject.toml
@@ -0,0 +1,10 @@
+[tool.black]
+line-length = 79
+py36 = true
+skip-string-normalization = true
+exclude = '''
+/(
+    \.serverless
+    | node_modules
+)/
+'''
diff --git a/tests/non_poetry_pyproject/serverless.yml b/tests/non_poetry_pyproject/serverless.yml
new file mode 100644
index 00000000..2456a72a
--- /dev/null
+++ b/tests/non_poetry_pyproject/serverless.yml
@@ -0,0 +1,18 @@
+service: sls-py-req-test
+
+provider:
+  name: aws
+  runtime: python3.6
+
+plugins:
+  - serverless-python-requirements
+
+package:
+  exclude:
+    - '**/*'
+  include:
+    - handler.py
+
+functions:
+  hello:
+    handler: handler.hello