diff --git a/sdk/core/azure-core/src/test/java/com/azure/core/http/ReactorNettyClientTests.java b/sdk/core/azure-core/src/test/java/com/azure/core/http/ReactorNettyClientTests.java
index 4d486fc00cdf1..d5b182d585927 100644
--- a/sdk/core/azure-core/src/test/java/com/azure/core/http/ReactorNettyClientTests.java
+++ b/sdk/core/azure-core/src/test/java/com/azure/core/http/ReactorNettyClientTests.java
@@ -72,7 +72,6 @@ public void testFlowableResponseLongBodyAsByteArrayAsync() {
         checkBodyReceived(LONG_BODY, "/long");
     }
 
-
     @Test
     public void testMultipleSubscriptionsEmitsError() {
         HttpResponse response = getResponse("/short");
@@ -94,8 +93,6 @@ public void testDispose() throws InterruptedException {
         Assert.assertTrue(response.internConnection().isDisposed());
     }
 
-
-
     @Test
     public void testCancel() {
         HttpResponse response = getResponse("/long");
@@ -217,6 +214,7 @@ public void testServerShutsDownSocketShouldPushErrorToContentFlowable()
         }
     }
 
+    @Ignore("This flakey test fails often on MacOS. https://github.com/Azure/azure-sdk-for-java/issues/4357.")
     @Test
     public void testConcurrentRequests() throws NoSuchAlgorithmException {
         long t = System.currentTimeMillis();