diff --git a/src/test/java/org/wiremock/grpc/GrpcAcceptanceTest.java b/src/test/java/org/wiremock/grpc/GrpcAcceptanceTest.java
index 096d4e6..03c312e 100644
--- a/src/test/java/org/wiremock/grpc/GrpcAcceptanceTest.java
+++ b/src/test/java/org/wiremock/grpc/GrpcAcceptanceTest.java
@@ -284,7 +284,7 @@ void fixedDelay() {
     stopwatch.stop();
 
     assertThat(greeting, is("Delayed hello"));
-    assertThat(stopwatch.elapsed(), greaterThanOrEqualTo(Duration.ofMillis(1000L)));
+    assertThat(stopwatch.elapsed(), greaterThanOrEqualTo(Duration.ofMillis(990L)));
   }
 
   @Test