diff --git a/basis/compiler/tests/folding.factor b/basis/compiler/tests/folding.factor
new file mode 100644
index 0000000000..d6868fd034
--- /dev/null
+++ b/basis/compiler/tests/folding.factor
@@ -0,0 +1,30 @@
+USING: eval tools.test compiler.units vocabs multiline words
+kernel classes.mixin arrays ;
+IN: compiler.tests
+
+! Calls to generic words were not folded away.
+
+[ ] [ [ "compiler.tests.redefine11" forget-vocab ] with-compilation-unit ] unit-test
+
+[ ] [
+    <"
+    USING: math arrays ;
+    IN: compiler.tests.folding
+    GENERIC: foldable-generic ( a -- b ) foldable
+    M: integer foldable-generic f <array> ;
+    "> eval
+] unit-test
+
+[ ] [
+    <"
+    USING: math arrays ;
+    IN: compiler.tests.folding
+    : fold-test ( -- x ) 10 foldable-generic ;
+    "> eval
+] unit-test
+
+[ t ] [
+    "fold-test" "compiler.tests.folding" lookup execute
+    "fold-test" "compiler.tests.folding" lookup execute
+    eq?
+] unit-test