diff --git a/tests/gtests/blenlib/BLI_vector_test.cc b/tests/gtests/blenlib/BLI_vector_test.cc
index a020611aed6..25435739a43 100644
--- a/tests/gtests/blenlib/BLI_vector_test.cc
+++ b/tests/gtests/blenlib/BLI_vector_test.cc
@@ -657,7 +657,7 @@ TEST(vector, ConstructVoidPointerVector)
   float b;
   double c;
   Vector<void *> vec = {&a, &b, &c};
-  EXPECT_EQ(vec.size(), 3);
+  EXPECT_EQ(vec.size(), 3u);
 }
 
 }  // namespace blender