diff --git a/apm-agent-core/src/test/java/co/elastic/apm/agent/util/CompletableFutureTest.java b/apm-agent-core/src/test/java/co/elastic/apm/agent/util/CompletableFutureTest.java
index a06d6c32f8..39de0f0905 100644
--- a/apm-agent-core/src/test/java/co/elastic/apm/agent/util/CompletableFutureTest.java
+++ b/apm-agent-core/src/test/java/co/elastic/apm/agent/util/CompletableFutureTest.java
@@ -69,7 +69,7 @@ void reset() {
     void testCancelBeforeStart() {
         final CompletableFuture<Object> completableFuture = new CompletableFuture<>();
         for (int i = 0; i < NUM_THREADS; i++) {
-            scheduledExecutorService.schedule(new CompletableFutureTester(completableFuture, 5), 200, TimeUnit.MILLISECONDS);
+            scheduledExecutorService.schedule(new CompletableFutureTester(completableFuture, 5), 300, TimeUnit.MILLISECONDS);
         }
         assertThat(completableFuture.cancel(false)).isTrue();
         assertThat(completableFuture.cancel(false)).isFalse();