diff --git a/packages/lit-query/src/__tests__/useMutationState.test.ts b/packages/lit-query/src/__tests__/useMutationState.test.ts
index 6b9f4a12bbc..20fe5819bf5 100644
--- a/packages/lit-query/src/__tests__/useMutationState.test.ts
+++ b/packages/lit-query/src/__tests__/useMutationState.test.ts
@@ -88,7 +88,7 @@ describe('useMutationState', () => {
 
   it('should not request another update when mutation cache emits with unchanged selected state', async () => {
     const mutationKey = createKey()
-    const mutation = queryClient.getMutationCache().build(queryClient, {
+    const existingMutation = queryClient.getMutationCache().build(queryClient, {
       mutationKey,
     })
 
@@ -127,7 +127,7 @@ describe('useMutationState', () => {
       for (let i = 0; i < 5; i += 1) {
         queryClient.getMutationCache().notify({
           type: 'updated',
-          mutation,
+          mutation: existingMutation,
           action: { type: 'pause' } as never,
         })
         await vi.advanceTimersByTimeAsync(0)
diff --git a/packages/preact-query/src/__tests__/useMutationState.test.tsx b/packages/preact-query/src/__tests__/useMutationState.test.tsx
index 87d7a804b31..8b7637112d8 100644
--- a/packages/preact-query/src/__tests__/useMutationState.test.tsx
+++ b/packages/preact-query/src/__tests__/useMutationState.test.tsx
@@ -308,11 +308,11 @@ describe('useMutationState', () => {
       const queryClient = new QueryClient()
       const key = createKey()
       const cache = queryClient.getMutationCache()
-      const mutation = cache.build(queryClient, {
+      const existingMutation = cache.build(queryClient, {
         mutationKey: key,
         meta: { time: 0 },
       })
-      const state = mutation.state
+      const state = existingMutation.state
       const filters = { mutationKey: key }
       const select = (mutation: Mutation) =>
         resultType === 'Date'
@@ -336,7 +336,10 @@ describe('useMutationState', () => {
         ),
       ).toBeInTheDocument()
 
-      mutation.setOptions({ ...mutation.options, meta: { time: 1000 } })
+      existingMutation.setOptions({
+        ...existingMutation.options,
+        meta: { time: 1000 },
+      })
       rendered.rerender(<Page />)
       expect(
         rendered.getByText(
@@ -345,7 +348,7 @@ describe('useMutationState', () => {
             : 'result: [{"time":1000}]',
         ),
       ).toBeInTheDocument()
-      expect(mutation.state).toBe(state)
+      expect(existingMutation.state).toBe(state)
       expect(onCacheChange).not.toHaveBeenCalled()
       unsubscribe()
     },
diff --git a/packages/react-query/src/__tests__/useMutationState.test.tsx b/packages/react-query/src/__tests__/useMutationState.test.tsx
index 1ced91010cb..a0eecb1074c 100644
--- a/packages/react-query/src/__tests__/useMutationState.test.tsx
+++ b/packages/react-query/src/__tests__/useMutationState.test.tsx
@@ -308,11 +308,11 @@ describe('useMutationState', () => {
       const queryClient = new QueryClient()
       const key = createKey()
       const cache = queryClient.getMutationCache()
-      const mutation = cache.build(queryClient, {
+      const existingMutation = cache.build(queryClient, {
         mutationKey: key,
         meta: { time: 0 },
       })
-      const state = mutation.state
+      const state = existingMutation.state
       const filters = { mutationKey: key }
       const select = (mutation: Mutation) =>
         resultType === 'Date'
@@ -336,7 +336,10 @@ describe('useMutationState', () => {
         ),
       ).toBeInTheDocument()
 
-      mutation.setOptions({ ...mutation.options, meta: { time: 1000 } })
+      existingMutation.setOptions({
+        ...existingMutation.options,
+        meta: { time: 1000 },
+      })
       rendered.rerender(<Page />)
       expect(
         rendered.getByText(
@@ -345,7 +348,7 @@ describe('useMutationState', () => {
             : 'result: [{"time":1000}]',
         ),
       ).toBeInTheDocument()
-      expect(mutation.state).toBe(state)
+      expect(existingMutation.state).toBe(state)
       expect(onCacheChange).not.toHaveBeenCalled()
       unsubscribe()
     },