diff --git a/test/built-ins/ShadowRealm/prototype/evaluate/nested-realms.js b/test/built-ins/ShadowRealm/prototype/evaluate/nested-realms.js
index a76d9050c7..4868af9b3f 100644
--- a/test/built-ins/ShadowRealm/prototype/evaluate/nested-realms.js
+++ b/test/built-ins/ShadowRealm/prototype/evaluate/nested-realms.js
@@ -7,6 +7,12 @@ description: >
 features: [ShadowRealm]
 ---*/
 
+assert.sameValue(
+  typeof ShadowRealm.prototype.evaluate,
+  'function',
+  'This test must fail if ShadowRealm.prototype.evaluate is not a function'
+);
+
 globalThis.myValue = 'a';
 const realm1 = new ShadowRealm();
 
diff --git a/test/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js b/test/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js
index 56d76c51d4..8ea9a726ba 100644
--- a/test/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js
+++ b/test/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js
@@ -6,6 +6,11 @@ description: >
   ShadowRealm can wrap a function to multiple nested realms.
 features: [ShadowRealm]
 ---*/
+assert.sameValue(
+  typeof ShadowRealm.prototype.evaluate,
+  'function',
+  'This test must fail if ShadowRealm.prototype.evaluate is not a function'
+);
 
 globalThis.count = 0;
 const realm1 = new ShadowRealm();