diff --git a/CHANGELOG.md b/CHANGELOG.md
index 549d7efa84ec..f75eb3fced24 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@
 
 ### Performance
 
+- `[jest-runtime]` Fix module registry memory leak ([#8282](https://github.com/facebook/jest/pull/8282))
+
 ## 24.7.1
 
 ### Fixes
diff --git a/packages/jest-runtime/src/index.ts b/packages/jest-runtime/src/index.ts
index 86e7115f9860..9fbe5fdea215 100644
--- a/packages/jest-runtime/src/index.ts
+++ b/packages/jest-runtime/src/index.ts
@@ -517,8 +517,8 @@ class Runtime {
   resetModules() {
     this._isolatedModuleRegistry = null;
     this._isolatedMockRegistry = null;
-    this._mockRegistry = new Map();
-    this._moduleRegistry = new Map();
+    this._mockRegistry.clear();
+    this._moduleRegistry.clear();
 
     if (this._environment) {
       if (this._environment.global) {