diff --git a/requirements.txt b/requirements.txt
index 43091d0..804278a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 numpy==1.16.2
 six==1.12.0
 sorcery==0.1.0
-pytest==4.3.1
\ No newline at end of file
+pytest==4.3.1
+cloudpickle
\ No newline at end of file
diff --git a/tests/test_pqp.py b/tests/test_pqp.py
index 99de716..ef6604c 100644
--- a/tests/test_pqp.py
+++ b/tests/test_pqp.py
@@ -40,7 +40,6 @@ def test_integration_func():
             print(a)
 
 
-@pytest.mark.slow
 def test_lambda_func():
     task = lambda x: x
 
@@ -49,7 +48,6 @@ def test_lambda_func():
             print(a)
 
 
-# @pytest.mark.slow
 def test_integration_except():
     task = Exc()
 
@@ -73,3 +71,7 @@ def test_integration_except_ctx():
                 print(a)
 
     assert exc_info.type is NotImplementedError
+
+
+if __name__ == "__main__":
+    test_lambda_func()