diff --git a/packages/auth/README.md b/packages/auth/README.md
index 0592fa595a7..ad8ca35d5eb 100644
--- a/packages/auth/README.md
+++ b/packages/auth/README.md
@@ -17,6 +17,7 @@ host of npm scripts to run these tests. The most important commands are:
 | `yarn test:<platform>:unit:debug` | Runs \<platform> unit tests, auto-watching for file system changes |
 | `yarn test:<platform>:integration` | Runs only integration tests against the live environment |
 | `yarn test:<platform>:integration:local` | Runs all headless \<platform> integration tests against the emulator (more below) |
+| `yarn test:browser:integration:prodbackend` | Runs TOTP MFA integration tests against the backend (more below) |
 
 Where \<platform> is "browser" or "node". There are also cordova tests, but they
 are not broken into such granular details. Check out `package.json` for more.
@@ -46,6 +47,25 @@ you would simply execute the following command:
 firebase emulators:exec --project foo-bar --only auth "yarn test:integration:local"
 ```
 
+### Integration testing with the production backend
+
+Currently, MFA TOTP tests only run against the production backend (since they are not supported on the emulator yet).
+Running against the backend also makes it a more reliable end-to-end test.
+
+The TOTP tests require the following email/password combination to exist in the project, so if you are running this test against your test project, please create this user:
+
+'totpuser-donotdelete@test.com', 'password'
+
+You also need to verify this email address, in order to use MFA. This can be done with a curl command like this:
+
+```
+curl   -H "Authorization: Bearer $(gcloud auth print-access-token)"   -H "Content-Type: application/json"   -H "X-Goog-User-Project: ${PROJECT_ID}"   -X POST https://identitytoolkit.googleapis.com/v1/accounts:sendOobCode   -d     '{
+      "email": "totpuser-donotdelete@test.com",
+      "requestType": "VERIFY_EMAIL",
+      "returnOobLink": true,
+    }'
+```
+
 ### Selenium Webdriver tests
 
 These tests assume that you have both Firefox and Chrome installed on your
diff --git a/packages/auth/karma.conf.js b/packages/auth/karma.conf.js
index 8c4bcba24d2..4f82e4ab5a7 100644
--- a/packages/auth/karma.conf.js
+++ b/packages/auth/karma.conf.js
@@ -37,6 +37,9 @@ function getTestFiles(argv) {
   if (argv.unit) {
     return ['src/**/*.test.ts', 'test/helpers/**/*.test.ts'];
   } else if (argv.integration) {
+    if (argv.prodbackend) {
+      return ['test/integration/flows/totp.test.ts'];
+    }
     return argv.local
       ? ['test/integration/flows/*.test.ts']
       : ['test/integration/flows/*!(local).test.ts'];
diff --git a/packages/auth/package.json b/packages/auth/package.json
index 732c9fbe30b..ef6ac184f07 100644
--- a/packages/auth/package.json
+++ b/packages/auth/package.json
@@ -76,7 +76,7 @@
     "build:scripts": "tsc -moduleResolution node --module commonjs scripts/*.ts && ls scripts/*.js | xargs -I % sh -c 'terser %  -o %'",
     "dev": "rollup -c -w",
     "test": "run-p lint test:all",
-    "test:all": "run-p test:browser:unit test:node:unit test:integration",
+    "test:all": "run-p test:browser:unit test:node:unit test:integration test:browser:integration:prodbackend",
     "test:integration": "firebase emulators:exec --project emulatedproject --only auth \"run-s test:browser:integration:local test:node:integration:local test:webdriver\"",
     "test:ci": "node ../../scripts/run_tests_in_ci.js -s test:all",
     "test:integration:local": "run-s test:node:integration:local test:browser:integration:local test:webdriver",
@@ -84,6 +84,7 @@
     "test:browser:unit": "karma start --single-run --unit",
     "test:browser:integration": "karma start --single-run --integration",
     "test:browser:integration:local": "karma start --single-run --integration --local",
+    "test:browser:integration:prodbackend": "karma start --single-run --integration --prodbackend",
     "test:browser:debug": "karma start --auto-watch",
     "test:browser:unit:debug": "karma start --auto-watch --unit",
     "test:cordova": "karma start --single-run --cordova",