diff --git a/src/EFCore.Design/Design/OperationExecutor.cs b/src/EFCore.Design/Design/OperationExecutor.cs
index 73dae4cbe28..e9a7295a62f 100644
--- a/src/EFCore.Design/Design/OperationExecutor.cs
+++ b/src/EFCore.Design/Design/OperationExecutor.cs
@@ -697,7 +697,6 @@ public abstract class OperationBase : MarshalByRefObject
         /// <param name="resultHandler">The <see cref="IOperationResultHandler" />.</param>
         protected OperationBase(IOperationResultHandler resultHandler)
         {
-            EF.IsDesignTime = true;
             _resultHandler = resultHandler;
         }
 
@@ -707,6 +706,7 @@ protected OperationBase(IOperationResultHandler resultHandler)
         /// <param name="action">The action to execute.</param>
         protected virtual void Execute(Action action)
         {
+            EF.IsDesignTime = true;
             try
             {
                 action();
@@ -715,6 +715,10 @@ protected virtual void Execute(Action action)
             {
                 _resultHandler.OnError(ex.GetType().FullName!, ex.Message, ex.ToString());
             }
+            finally
+            {
+                EF.IsDesignTime = false;
+            }
         }
 
         /// <summary>
diff --git a/test/EFCore.Design.Tests/Design/OperationExecutorTest.cs b/test/EFCore.Design.Tests/Design/OperationExecutorTest.cs
index ce57bf03a06..072b5f8cf5b 100644
--- a/test/EFCore.Design.Tests/Design/OperationExecutorTest.cs
+++ b/test/EFCore.Design.Tests/Design/OperationExecutorTest.cs
@@ -23,12 +23,15 @@ public void Operations_have_design_time_flag_set()
             var handler = new OperationResultHandler();
             var result = "Twilight Sparkle";
 
+            Assert.False(EF.IsDesignTime);
+
             new MockOperation<string>(handler, () =>
             {
                 Assert.True(EF.IsDesignTime);
                 return result;
             });
 
+            Assert.False(EF.IsDesignTime);
             Assert.Equal(result, handler.Result);
         }