diff --git a/packages/angular_devkit/build_angular/src/webpack/plugins/karma.ts b/packages/angular_devkit/build_angular/src/webpack/plugins/karma.ts
index ae7876f027ac..5caaf4690f30 100644
--- a/packages/angular_devkit/build_angular/src/webpack/plugins/karma.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/plugins/karma.ts
@@ -99,6 +99,7 @@ const init: any = (config: any, emitter: any, customFileHandlers: any) => {
     const hasIstanbulReporter = reporters.includes('coverage-istanbul');
     if (hasCoveragePlugin && !hasCoverageReporter) {
       reporters.push('coverage');
+      logger.warn(`There is a known issue with Karma and karma-coverage. Tests that exceed the coverage threshold will not fail. This will be fixed in Karma 5.2.x soon.`)
     }
     else if (hasIstanbulPlugin && !hasIstanbulReporter) {
       // coverage-istanbul is deprecated in favor of karma-coverage
diff --git a/packages/schematics/angular/workspace/files/package.json.template b/packages/schematics/angular/workspace/files/package.json.template
index c203c22c86e9..598f967fb0cf 100644
--- a/packages/schematics/angular/workspace/files/package.json.template
+++ b/packages/schematics/angular/workspace/files/package.json.template
@@ -30,7 +30,7 @@
     "codelyzer": "^6.0.0",
     "jasmine-core": "~3.6.0",
     "jasmine-spec-reporter": "~5.0.0",
-    "karma": "~5.2.0",
+    "karma": "~5.1.1",
     "karma-chrome-launcher": "~3.1.0",
     "karma-coverage": "~2.0.3",
     "karma-jasmine": "~4.0.0",