diff --git a/plugins/groovy/testdata/highlighting/PassingCollectionSubtractionIntoGenericMethod.groovy b/plugins/groovy/testdata/highlighting/PassingCollectionSubtractionIntoGenericMethod.groovy
new file mode 100644
index 000000000000..d13089d52775
--- /dev/null
+++ b/plugins/groovy/testdata/highlighting/PassingCollectionSubtractionIntoGenericMethod.groovy
@@ -0,0 +1,10 @@
+def foo(Set<String> zzz) {
+  def xxx = ['a'] as Set<String>
+  while (xxx) {
+    def sub = xxx - xxx.iterator().next()
+    xxx = bar(sub, zzz)
+    <warning descr="Can not resolve symbol 'doo'">doo</warning>()
+  }
+}
+
+def <T> Set<T> bar(Set<T> xxx, Set<T> yyy) { xxx }