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diff --git a/test-suite/bugs/closed/4190.v b/test-suite/bugs/closed/4190.v
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--- /dev/null
+++ b/test-suite/bugs/closed/4190.v
@@ -0,0 +1,15 @@
+Module Type A .
+ Tactic Notation "bar" := idtac "ITSME".
+End A.
+
+Module Type B.
+ Tactic Notation "foo" := fail "NOTME".
+End B.
+
+Module Type C := A <+ B.
+
+Module Type F (Import M : C).
+
+Lemma foo : True.
+Proof.
+bar.