diff --git a/core/classes/tuple/tuple-tests.factor b/core/classes/tuple/tuple-tests.factor
index 0fac0c3779..950650dbf0 100755
--- a/core/classes/tuple/tuple-tests.factor
+++ b/core/classes/tuple/tuple-tests.factor
@@ -410,6 +410,14 @@ test-a/b
 
 test-a/b
 
+! Twice in the same compilation unit
+[
+    test1 tuple { "a" "x" "y" } define-tuple-class
+    test1 tuple { "a" "y" } define-tuple-class
+] with-compilation-unit
+
+test-a/b
+
 ! Redefinition problem
 TUPLE: redefinition-problem ;