diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 70c4b2d..21dea66 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -72,6 +72,8 @@ jobs:
         toxenv:
           - flake8
           - isort
+          - check-manifest
+          - check-python-versions
 
     steps:
       - name: Git clone
diff --git a/tox.ini b/tox.ini
index 21fe914..34470bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,3 +43,13 @@ basepython = python3
 deps = isort
 skip_install = true
 commands = isort {posargs: -c --diff} src setup.py gtimelog runtests benchmark.py
+
+[testenv:check-manifest]
+deps = check-manifest
+skip_install = true
+commands = check-manifest {posargs}
+
+[testenv:check-python-versions]
+deps = check-python-versions
+skip_install = true
+commands = check-python-versions {posargs}