diff --git a/frontend/layout/tests/layoutNode.test.ts b/frontend/layout/tests/layoutNode.test.ts
index 12fa565c..426c4256 100644
--- a/frontend/layout/tests/layoutNode.test.ts
+++ b/frontend/layout/tests/layoutNode.test.ts
@@ -2,14 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { assert, test } from "vitest";
-import {
-    addChildAt,
-    addIntermediateNode,
-    balanceNode,
-    findNextInsertLocation,
-    newLayoutNode,
-} from "../lib/layoutNode.js";
-import { FlexDirection, LayoutNode } from "../lib/types.js";
+import { addChildAt, addIntermediateNode, balanceNode, findNextInsertLocation, newLayoutNode } from "../lib/layoutNode";
+import { FlexDirection, LayoutNode } from "../lib/types";
 
 test("newLayoutNode", () => {
     assert.throws(
diff --git a/frontend/layout/tests/layoutTree.test.ts b/frontend/layout/tests/layoutTree.test.ts
index 5ef417bf..03cb3209 100644
--- a/frontend/layout/tests/layoutTree.test.ts
+++ b/frontend/layout/tests/layoutTree.test.ts
@@ -2,15 +2,15 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { assert, test } from "vitest";
-import { newLayoutNode } from "../lib/layoutNode.js";
-import { computeMoveNode, moveNode } from "../lib/layoutTree.js";
+import { newLayoutNode } from "../lib/layoutNode";
+import { computeMoveNode, moveNode } from "../lib/layoutTree";
 import {
     DropDirection,
     LayoutTreeActionType,
     LayoutTreeComputeMoveNodeAction,
     LayoutTreeMoveNodeAction,
-} from "../lib/types.js";
-import { newLayoutTreeState } from "./model.js";
+} from "../lib/types";
+import { newLayoutTreeState } from "./model";
 
 test("layoutTreeStateReducer - compute move", () => {
     let treeState = newLayoutTreeState(newLayoutNode(undefined, undefined, undefined, { blockId: "root" }));
diff --git a/frontend/layout/tests/utils.test.ts b/frontend/layout/tests/utils.test.ts
index 29d5ae1e..aa439bc2 100644
--- a/frontend/layout/tests/utils.test.ts
+++ b/frontend/layout/tests/utils.test.ts
@@ -2,8 +2,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { assert, test } from "vitest";
-import { DropDirection, FlexDirection } from "../lib/types.js";
-import { determineDropDirection, reverseFlexDirection } from "../lib/utils.js";
+import { DropDirection, FlexDirection } from "../lib/types";
+import { determineDropDirection, reverseFlexDirection } from "../lib/utils";
 
 test("determineDropDirection", () => {
     const dimensions: Dimensions = {