diff --git a/packages/react-resizable-panels/src/Panel.test.tsx b/packages/react-resizable-panels/src/Panel.test.tsx
index b873d870..bc4aabe8 100644
--- a/packages/react-resizable-panels/src/Panel.test.tsx
+++ b/packages/react-resizable-panels/src/Panel.test.tsx
@@ -21,7 +21,7 @@ describe("PanelGroup", () => {
   }
 
   beforeEach(() => {
-    // @ts-expect-error No type definitions for global
+    // @ts-expect-error global.IS_REACT_ACT_ENVIRONMENT is not typed
     global.IS_REACT_ACT_ENVIRONMENT = true;
 
     uninstallMockOffsetWidthAndHeight = mockPanelGroupOffsetWidthAndHeight();
diff --git a/packages/react-resizable-panels/src/PanelResizeHandle.test.tsx b/packages/react-resizable-panels/src/PanelResizeHandle.test.tsx
index ec613f80..a9c4c2c3 100644
--- a/packages/react-resizable-panels/src/PanelResizeHandle.test.tsx
+++ b/packages/react-resizable-panels/src/PanelResizeHandle.test.tsx
@@ -27,7 +27,7 @@ describe("PanelResizeHandle", () => {
   let container: HTMLElement;
 
   beforeEach(() => {
-    // @ts-expect-error globalThis is not typed
+    // @ts-expect-error global.IS_REACT_ACT_ENVIRONMENT is not typed
     global.IS_REACT_ACT_ENVIRONMENT = true;
     container = document.createElement("div");
     document.body.appendChild(container);