diff --git a/packages/jest-core/src/TestScheduler.ts b/packages/jest-core/src/TestScheduler.ts
index 17ab8f9bd2b8..b3543b43cccf 100644
--- a/packages/jest-core/src/TestScheduler.ts
+++ b/packages/jest-core/src/TestScheduler.ts
@@ -281,7 +281,7 @@ export default class TestScheduler {
     return aggregatedResults;
   }
 
-  private _partitionTests(
+  private static _partitionTests(
     testRunners: Record<string, TestRunner>,
     tests: Array<TestRunner.Test>,
   ): Record<string, Array<TestRunner.Test>> | null {