diff --git a/vault/expiration_test.go b/vault/expiration_test.go
index 99018ca73..7a6079ece 100644
--- a/vault/expiration_test.go
+++ b/vault/expiration_test.go
@@ -2531,7 +2531,8 @@ func registerOneLease(t *testing.T, ctx context.Context, exp *ExpirationManager)
 }
 
 func TestExpiration_MarkIrrevocable(t *testing.T) {
-	exp := mockExpiration(t)
+	c, _, _ := TestCoreUnsealed(t)
+	exp := c.expiration
 	ctx := namespace.RootContext(nil)
 
 	leaseID := registerOneLease(t, ctx, exp)
@@ -2570,7 +2571,7 @@ func TestExpiration_MarkIrrevocable(t *testing.T) {
 	}
 
 	// stop and restore to verify that irrevocable leases are properly loaded from storage
-	err = exp.Stop()
+	err = c.stopExpiration()
 	if err != nil {
 		t.Fatalf("error stopping expiration manager: %v", err)
 	}
@@ -2646,7 +2647,8 @@ func TestExpiration_FetchLeaseTimesIrrevocable(t *testing.T) {
 }
 
 func TestExpiration_StopClearsIrrevocableCache(t *testing.T) {
-	exp := mockExpiration(t)
+	c, _, _ := TestCoreUnsealed(t)
+	exp := c.expiration
 	ctx := namespace.RootContext(nil)
 
 	leaseID := registerOneLease(t, ctx, exp)
@@ -2656,7 +2658,7 @@ func TestExpiration_StopClearsIrrevocableCache(t *testing.T) {
 	}
 
 	exp.markLeaseIrrevocable(ctx, le, fmt.Errorf("test irrevocable error"))
-	err = exp.Stop()
+	err = c.stopExpiration()
 	if err != nil {
 		t.Fatalf("error stopping expiration manager: %v", err)
 	}