diff --git a/src/libraries/System.Runtime/tests/System.IO.Tests/MemoryStream/MemoryStreamTests.cs b/src/libraries/System.Runtime/tests/System.IO.Tests/MemoryStream/MemoryStreamTests.cs
index ee77811f224290..a6cac02f63a2e3 100644
--- a/src/libraries/System.Runtime/tests/System.IO.Tests/MemoryStream/MemoryStreamTests.cs
+++ b/src/libraries/System.Runtime/tests/System.IO.Tests/MemoryStream/MemoryStreamTests.cs
@@ -160,9 +160,9 @@ public void MemoryStream_CapacityBoundaryChecks()
                 ms.Capacity = MaxSupportedLength;
                 Assert.Equal(MaxSupportedLength, ms.Capacity);
 
-                Assert.Throws<ArgumentOutOfRangeException>(() => ms.Capacity = MaxSupportedLength + 1);
+                Assert.Throws<OutOfMemoryException>(() => ms.Capacity = MaxSupportedLength + 1);
 
-                Assert.Throws<ArgumentOutOfRangeException>(() => ms.Capacity = int.MaxValue);
+                Assert.Throws<OutOfMemoryException>(() => ms.Capacity = int.MaxValue);
             }
         }