diff --git a/tests/geometry/size.cpp b/tests/geometry/size.cpp
index d29b4b19b9..a84514bb2c 100644
--- a/tests/geometry/size.cpp
+++ b/tests/geometry/size.cpp
@@ -17,6 +17,8 @@
     #include "wx/gdicmn.h"
 #endif // WX_PRECOMP
 
+#include "asserthelper.h"
+
 TEST_CASE("wxSize::Operators", "[size]")
 {
     wxSize s1(1,2);
@@ -24,33 +26,26 @@ TEST_CASE("wxSize::Operators", "[size]")
     wxSize s3;
 
     s3 = s1 + s2;
-    CHECK( s3.GetWidth()==4 );
-    CHECK( s3.GetHeight()==6 );
+    CHECK( s3 == wxSize(4, 6) );
     s3 = s2 - s1;
-    CHECK( s3.GetWidth()==2 );
-    CHECK( s3.GetHeight()==2 );
+    CHECK( s3 == wxSize(2, 2) );
     s3 = s1 * 2;
-    CHECK( s3.GetWidth()==2 );
-    CHECK( s3.GetHeight()==4 );
+    CHECK( s3 == wxSize(2, 4) );
     s3 = 2 * s1;
-    CHECK( s3.GetWidth()==2 );
-    CHECK( s3.GetHeight()==4 );
+    CHECK( s3 == wxSize(2, 4) );
     s3 = s3 / 2;
-    CHECK( s3.GetWidth()==1 );
-    CHECK( s3.GetHeight()==2 );
+    CHECK( s3 == wxSize(1, 2) );
 
     s3 = s2;
     CHECK( s3 != s1 );
     s3 = s1;
     CHECK( s3 == s1 );
     s3 += s2;
-    CHECK( s3.GetWidth()==4 );
-    CHECK( s3.GetHeight()==6 );
+    CHECK( s3 == wxSize(4, 6) );
     s3 -= s2;
     CHECK( s3 == s1 );
     s3 *= 2;
-    CHECK( s3.GetWidth()==2 );
-    CHECK( s3.GetHeight()==4 );
+    CHECK( s3 == wxSize(2, 4) );
     s3 /= 2;
     CHECK( s3 == s1 );
 }