diff --git a/tox.ini b/tox.ini
index 1b3cd4ef0d39955197448ace9fdf5d26ea6749b4..d8ff2f23c856e4481e66c1f3983af59c994a4fc1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,4 +10,5 @@ deps=nose
     openpyxl
     xlrd == 1.2
     h5py
-commands=py.test --cov=caosadvancedtools -vv {posargs}
+commands=python3 unittests/print_versions.py
+    py.test --cov=caosadvancedtools -vv {posargs}
diff --git a/unittests/print_versions.py b/unittests/print_versions.py
new file mode 100644
index 0000000000000000000000000000000000000000..07319c0bcb5185a0bc0edbf97d130f0438996093
--- /dev/null
+++ b/unittests/print_versions.py
@@ -0,0 +1,5 @@
+import caosdb as db
+import caosadvancedtools
+
+print(f"pycaosdb version: {db.__version__}")
+print(f"caosadvancedtools version: {caosadvancedtools.__version__}")