diff --git a/plugin/auth_pam/testing/CMakeLists.txt b/plugin/auth_pam/testing/CMakeLists.txt
index 112de5bd43c..2bc719e5f2f 100644
--- a/plugin/auth_pam/testing/CMakeLists.txt
+++ b/plugin/auth_pam/testing/CMakeLists.txt
@@ -10,7 +10,9 @@ IF(CMAKE_C_COMPILER_ID MATCHES "Clang")
     PROPERTY COMPILE_FLAGS "-Wno-incompatible-pointer-types-discards-qualifiers")
 ENDIF()
 
-SET(PAM_MARIADB_MTR_LOCATON ${INSTALL_PLUGINDIR}/test_pam_modules)
-INSTALL(TARGETS pam_mariadb_mtr DESTINATION ${PAM_MARIADB_MTR_LOCATON} COMPONENT Test)
-CONFIGURE_FILE(mariadb_mtr.conf mariadb_mtr)
-INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/mariadb_mtr DESTINATION "${INSTALL_MYSQLTESTDIR}/suite/plugins/pam" COMPONENT Test)
+IF(INSTALL_MYSQLTESTDIR)
+  SET(PAM_MARIADB_MTR_LOCATON ${INSTALL_PLUGINDIR}/test_pam_modules)
+  INSTALL(TARGETS pam_mariadb_mtr DESTINATION ${PAM_MARIADB_MTR_LOCATON} COMPONENT Test)
+  CONFIGURE_FILE(mariadb_mtr.conf mariadb_mtr)
+  INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/mariadb_mtr DESTINATION "${INSTALL_MYSQLTESTDIR}/suite/plugins/pam" COMPONENT Test)
+ENDIF()