diff --git a/tests/test/tcustomattr13.pp b/tests/test/tcustomattr13.pp
index b09cce0fb8..e65b1be3f2 100644
--- a/tests/test/tcustomattr13.pp
+++ b/tests/test/tcustomattr13.pp
@@ -131,7 +131,7 @@ begin
     Halt(61);
   if aStrm.Read(cu, SizeOf(cu)) <> SizeOf(cu) then
     Halt(62);
-  if SameValue(cu, CurrVal, 0.00009) then
+  if not SameValue(cu, CurrVal, 0.00009) then
     Halt(63);
   if aStrm.Read(g, SizeOf(g)) <> SizeOf(g) then
     Halt(64);