diff --git a/all_tests.sh b/all_tests.sh
index 4e8e1646..1cc93e42 100755
--- a/all_tests.sh
+++ b/all_tests.sh
@@ -1,8 +1,11 @@
 #!/bin/sh
 
-python --version
+python3 --version
 echo "Please make sure you are using python 3.6.x"
 
+solc --version
+echo "Please make sure you are using solc 0.4.21"
+
 rm -rf ./tests/testdata/outputs_current/
 mkdir -p ./tests/testdata/outputs_current/
 python3 -m unittest discover -p "*_test.py"