1 files changed, 17 insertions, 0 deletions
diff --git a/cli/tests/unit/performance_test.ts b/cli/tests/unit/performance_test.ts
index 3c98e4e40..7b2fa5cef 100644
--- a/cli/tests/unit/performance_test.ts
+++ b/cli/tests/unit/performance_test.ts
@@ -3,6 +3,7 @@ import {
   unitTest,
   assert,
   assertEquals,
+  assertThrows,
   createResolvable,
 } from "./test_util.ts";
 
@@ -64,3 +65,19 @@ unitTest(function performanceMeasure() {
     }, 100);
   });
 });
+
+unitTest(function performanceIllegalConstructor() {
+  assertThrows(() => new Performance(), TypeError, "Illegal constructor.");
+});
+
+unitTest(function performanceEntryIllegalConstructor() {
+  assertThrows(() => new PerformanceEntry(), TypeError, "Illegal constructor.");
+});
+
+unitTest(function performanceMeasureIllegalConstructor() {
+  assertThrows(
+    () => new PerformanceMeasure(),
+    TypeError,
+    "Illegal constructor.",
+  );
+});