diff --git a/pkgs/ffigen/test/native_objc_test/block_test.dart b/pkgs/ffigen/test/native_objc_test/block_test.dart
index 4d4a78eec..8ca83af17 100644
--- a/pkgs/ffigen/test/native_objc_test/block_test.dart
+++ b/pkgs/ffigen/test/native_objc_test/block_test.dart
@@ -154,9 +154,7 @@ void main() {
         expect(result1.z, 7.8);
         expect(result1.w, 1.2);
 
-        final result2Ptr = arena<Vec4>();
-        final result2 = result2Ptr.ref;
-        BlockTester.callVec4Block_(result2Ptr, block);
+        final result2 = BlockTester.callVec4Block_(block);
         expect(result2.x, 3.4);
         expect(result2.y, 5.6);
         expect(result2.z, 7.8);
diff --git a/pkgs/ffigen/test/native_objc_test/property_test.dart b/pkgs/ffigen/test/native_objc_test/property_test.dart
index d0067d704..caba1cc0c 100644
--- a/pkgs/ffigen/test/native_objc_test/property_test.dart
+++ b/pkgs/ffigen/test/native_objc_test/property_test.dart
@@ -59,17 +59,14 @@ void main() {
         input.z = 5.6;
         input.w = 7.8;
 
-        final resultPtr = calloc<Vec4>();
-        final result = resultPtr.ref;
         testInstance.structProperty = input;
-        testInstance.getStructProperty(resultPtr);
+        final result = testInstance.structProperty;
         expect(result.x, 1.2);
         expect(result.y, 3.4);
         expect(result.z, 5.6);
         expect(result.w, 7.8);
 
         calloc.free(inputPtr);
-        calloc.free(resultPtr);
       });
 
       test('Floats', () {