diff --git a/commafeed-client/src/components/ActionButton.test.tsx b/commafeed-client/src/components/ActionButton.test.tsx
index 174e3dd6..72bc34d5 100644
--- a/commafeed-client/src/components/ActionButton.test.tsx
+++ b/commafeed-client/src/components/ActionButton.test.tsx
@@ -12,9 +12,6 @@ vi.mock("@lingui/react", () => ({
 }))
 vi.mock("hooks/useActionButton")
 
-// reduce delay for faster tests
-vi.mock("app/constants", () => ({ Constants: { tooltip: { delay: 10 } } }))
-
 const label = "Test Label"
 const icon = "Test Icon"
 describe("ActionButton", () => {
diff --git a/commafeed-client/src/setupTests.ts b/commafeed-client/src/setupTests.ts
index cec20489..03b98b06 100644
--- a/commafeed-client/src/setupTests.ts
+++ b/commafeed-client/src/setupTests.ts
@@ -1,6 +1,12 @@
 import "@testing-library/jest-dom"
+import { Constants } from "app/constants"
 import { vi } from "vitest"
 
+// reduce delay for faster tests
+Constants.tooltip.delay = 10
+
+// jsdom doesn't mock matchMedia
+// https://stackoverflow.com/a/53449595/
 Object.defineProperty(window, "matchMedia", {
     writable: true,
     value: vi.fn().mockImplementation(query => ({