diff --git a/internal/filer_test.go b/internal/filer_test.go
index 44605bacb..a2760d911 100644
--- a/internal/filer_test.go
+++ b/internal/filer_test.go
@@ -752,12 +752,31 @@ func TestAccWorkspaceFilesExtensionsNotebooksAreNotStatAsFiles(t *testing.T) {
 	err := wf.Write(ctx, "foo.ipynb", strings.NewReader(readFile(t, "testdata/notebooks/py1.ipynb")))
 	require.NoError(t, err)
 
-	// Reading foo should fail. Even though the WSFS name for the notebook is foo
-	// reading the notebook should only work with the .ipynb extension.
+	// Stating foo should fail. Even though the WSFS name for the notebook is foo
+	// stating the notebook should only work with the .ipynb extension.
 	_, err = wf.Stat(ctx, "foo")
 	assert.ErrorIs(t, err, fs.ErrNotExist)
 
-	_, err = wf.Read(ctx, "foo.ipynb")
+	_, err = wf.Stat(ctx, "foo.ipynb")
+	assert.NoError(t, err)
+}
+
+func TestAccWorkspaceFilesExtensionsNotebooksAreNotDeletedAsFiles(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+	wf, _ := setupWsfsExtensionsFiler(t)
+
+	// Create a notebook
+	err := wf.Write(ctx, "foo.ipynb", strings.NewReader(readFile(t, "testdata/notebooks/py1.ipynb")))
+	require.NoError(t, err)
+
+	// Deleting foo should fail. Even though the WSFS name for the notebook is foo
+	// deleting the notebook should only work with the .ipynb extension.
+	err = wf.Delete(ctx, "foo")
+	assert.ErrorIs(t, err, fs.ErrNotExist)
+
+	err = wf.Delete(ctx, "foo.ipynb")
 	assert.NoError(t, err)
 }
 
diff --git a/libs/filer/workspace_files_extensions_client.go b/libs/filer/workspace_files_extensions_client.go
index 65485a46f..2a6052091 100644
--- a/libs/filer/workspace_files_extensions_client.go
+++ b/libs/filer/workspace_files_extensions_client.go
@@ -287,7 +287,18 @@ func (w *workspaceFilesExtensionsClient) Delete(ctx context.Context, name string
 		return ReadOnlyError{"delete"}
 	}
 
-	err := w.wsfs.Delete(ctx, name, mode...)
+	// Ensure that the file / notebook exists. We do this check here to avoid
+	// deleting the a notebook called `foo` when the user actually wanted to
+	// delete a file called `foo`.
+	//
+	// To delete a notebook called `foo` in the workspace the user should use the
+	// name with the extension included like `foo.ipynb` or `foo.sql`.
+	_, err := w.Stat(ctx, name)
+	if err != nil {
+		return err
+	}
+
+	err = w.wsfs.Delete(ctx, name, mode...)
 
 	// If the file is not found, it might be a notebook.
 	if errors.As(err, &FileDoesNotExistError{}) {