diff --git a/tests/integration_tests/parallel_test.py b/tests/integration_tests/parallel_test.py
index 898d1dd7..5d0f1fec 100644
--- a/tests/integration_tests/parallel_test.py
+++ b/tests/integration_tests/parallel_test.py
@@ -12,5 +12,6 @@ def test_parallel():
     processes = [Popen(program, stdout=PIPE, shell=True) for i in range(30)]
     for p in processes:
         out, err = p.communicate()
+        print(out)
         json_output = json.loads(out.decode("utf-8"))
         assert json_output["success"] == True
diff --git a/tox.ini b/tox.ini
index e6223845..fb4bebf8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = python3.9, python3.10
+envlist = python3.7, python3.9, python3.10
 
 [testenv]
 deps =