diff --git a/lib/internal/test_runner/mock/mock.js b/lib/internal/test_runner/mock/mock.js
index 9dc358397aa1f9..86a2c5199af368 100644
--- a/lib/internal/test_runner/mock/mock.js
+++ b/lib/internal/test_runner/mock/mock.js
@@ -671,7 +671,7 @@ class MockTracker {
 
     if (baseURL.searchParams.has(kMockSearchParam)) {
       throw new ERR_INVALID_STATE(
-        `Cannot mock '${specifier}.' The module is already mocked.`,
+        `Cannot mock '${specifier}'. The module is already mocked.`,
       );
     }