diff --git a/tests/unit-tests/challenge-email.t.cpp b/tests/unit-tests/challenge-email.t.cpp
index 834411d..8ff47c4 100644
--- a/tests/unit-tests/challenge-email.t.cpp
+++ b/tests/unit-tests/challenge-email.t.cpp
@@ -19,8 +19,7 @@
  */
 
 #include "challenge-module/challenge-email.hpp"
-
-#include "identity-management-fixture.hpp"
+#include "test-common.hpp"
 
 namespace ndn {
 namespace ndncert {