diff --git a/.travis.yml b/.travis.yml
index e8d15e3b9..dc21e73dd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -78,14 +78,20 @@ matrix:
         - python3 -m py_compile ./tools/donate-cpu.py
         - python -m py_compile ./tools/donate-cpu-server.py
         - python3 -m py_compile ./tools/donate-cpu-server.py
-# check addons/misra.py
+# check addons/misc.py
         - cd addons/test
         - ${CPPCHECK} --dump misc-test.cpp
         - python3 ../misc.py -verify misc-test.cpp.dump
+        - cd ../../
+# check addons/cert.py
+        - cd addons/test
         - ${CPPCHECK} --dump cert-test.c
         - python3 ../cert.py -verify cert-test.c.dump
         - ${CPPCHECK} --dump cert-test.cpp
         - python3 ../cert.py -verify cert-test.cpp.dump
+        - cd ../../
+# check addons/misra.py
+        - cd addons/test
         - ${CPPCHECK} --dump misra-test.c
         - python3 ../misra.py -verify misra-test.c.dump
         - ${CPPCHECK} --dump misra-test.cpp