diff --git a/sdk/resourcemanager/Azure.ResourceManager.Core/tests/Scenario/SubscriptionContainerTests.cs b/sdk/resourcemanager/Azure.ResourceManager.Core/tests/Scenario/SubscriptionContainerTests.cs
index aef5b79a0c5a..e743ba74fd33 100644
--- a/sdk/resourcemanager/Azure.ResourceManager.Core/tests/Scenario/SubscriptionContainerTests.cs
+++ b/sdk/resourcemanager/Azure.ResourceManager.Core/tests/Scenario/SubscriptionContainerTests.cs
@@ -43,6 +43,8 @@ public async Task Get()
             string subscriptionId = Client.DefaultSubscription.Id.SubscriptionId;
             Subscription result = await Client.GetSubscriptions().GetAsync(subscriptionId).ConfigureAwait(false);
             Assert.AreEqual(subscriptionId, result.Id.SubscriptionId);
+
+            Assert.ThrowsAsync<ArgumentNullException>(async () => _ = await Client.GetSubscriptions().GetAsync(null).ConfigureAwait(false));
         }
 
         [TestCase]