diff --git a/tests/unit-tests/security/v2/key-chain.t.cpp b/tests/unit-tests/security/v2/key-chain.t.cpp
index 4eaf75e..d1a954c 100644
--- a/tests/unit-tests/security/v2/key-chain.t.cpp
+++ b/tests/unit-tests/security/v2/key-chain.t.cpp
@@ -47,6 +47,12 @@
     unsetenv("NDN_CLIENT_PIB");
     unsetenv("NDN_CLIENT_TPM");
   }
+
+  ~TestHomeAndPibFixture()
+  {
+    const_cast<std::string&>(KeyChain::getDefaultPibLocator()).clear();
+    const_cast<std::string&>(KeyChain::getDefaultTpmLocator()).clear();
+  }
 };
 
 struct PibPathConfigFileHome