diff --git a/ui/src/ui/components/resizable-divider.test.ts b/ui/src/ui/components/resizable-divider.test.ts
index a98af9d3b92..f7f446208ce 100644
--- a/ui/src/ui/components/resizable-divider.test.ts
+++ b/ui/src/ui/components/resizable-divider.test.ts
@@ -172,14 +172,14 @@ describe("resizable-divider", () => {
 
     dispatchPointer(divider, "pointerdown", 100);
     expect(document.activeElement).toBe(divider);
-    expect(divider.classList.contains("dragging")).toBe(true);
+    expect([...divider.classList]).toEqual(["dragging"]);
     expect(setPointerCapture).toHaveBeenCalledWith(7);
 
     dispatchPointer(document, "pointermove", 220);
     expectLastResizeRatio(resized, 0.7);
 
     dispatchPointer(document, "pointerup", 220);
-    expect(divider.classList.contains("dragging")).toBe(false);
+    expect([...divider.classList]).toEqual([]);
     expect(releasePointerCapture).toHaveBeenCalledWith(7);
   });
 });