diff --git a/src/EditorFeatures/CSharpTest/CodeActions/IntroduceVariable/IntroduceVariableTests.cs b/src/EditorFeatures/CSharpTest/CodeActions/IntroduceVariable/IntroduceVariableTests.cs
index 9ec5243d3e9c6c79de49608cb23031608d6b28e0..15bda16ef3d2901f2955b349e38061cfbc36ed27 100644
--- a/src/EditorFeatures/CSharpTest/CodeActions/IntroduceVariable/IntroduceVariableTests.cs
+++ b/src/EditorFeatures/CSharpTest/CodeActions/IntroduceVariable/IntroduceVariableTests.cs
@@ -7328,5 +7328,43 @@ private static object Foo()
     }
 }", index: 1, options: ImplicitTypingEverywhere());
         }
+
+        [WorkItem(12591, "https://github.com/dotnet/roslyn/issues/12591")]
+        [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsIntroduceVariable)]
+        public async Task TestWhitespaceSelection1()
+        {
+            await TestInRegularAndScriptAsync(
+@"public class Class1
+{
+    void M()
+    {
+        Foo(1,[| Bar()|]);
+    }
+
+    private void Foo(int v1, object v2)
+    {
+    }
+
+    private object Bar()
+    {
+    }
+}",
+@"public class Class1
+{
+    void M()
+    {
+        object {|Rename:v2|} = Bar();
+        Foo(1, v2);
+    }
+
+    private void Foo(int v1, object v2)
+    {
+    }
+
+    private object Bar()
+    {
+    }
+}");
+        }
     }
 }