1 files changed, 9 insertions, 0 deletions
diff --git a/cli/tests/unit/unit_test_runner.ts b/cli/tests/unit/unit_test_runner.ts
index e3df358d7..38db545c7 100755
--- a/cli/tests/unit/unit_test_runner.ts
+++ b/cli/tests/unit/unit_test_runner.ts
@@ -2,6 +2,8 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import "./unit_tests.ts";
 import {
+  REGISTERED_UNIT_TESTS,
+  colors,
   readLines,
   permissionCombinations,
   Permissions,
@@ -225,6 +227,13 @@ async function masterRunnerMain(
   }
 
   console.log("Unit tests passed");
+
+  if (REGISTERED_UNIT_TESTS.find(({ only }) => only)) {
+    console.error(
+      `\n${colors.red("FAILED")} because the "only" option was used`
+    );
+    Deno.exit(1);
+  }
 }
 
 const HELP = `Unit test runner