diff --git a/httprunner/context.py b/httprunner/context.py
index 66bb3af8..aa06663e 100644
--- a/httprunner/context.py
+++ b/httprunner/context.py
@@ -34,14 +34,14 @@ class SessionContext(object):
 
         """
         self.test_variables_mapping = {}
+        self.test_variables_mapping.update(self.session_variables_mapping)
+
         variables_mapping = variables_mapping or {}
         variables_mapping = utils.ensure_mapping_format(variables_mapping)
         for variable_name, variable_value in variables_mapping.items():
             variable_value = self.eval_content(variable_value)
             self.update_test_variables(variable_name, variable_value)
 
-        self.test_variables_mapping.update(self.session_variables_mapping)
-
     def update_test_variables(self, variable_name, variable_value):
         """ update test variables, these variables are only valid in the current test.
         """
diff --git a/tests/testcases/create_and_check.yml b/tests/testcases/create_and_check.yml
index 1736f803..959a9da3 100644
--- a/tests/testcases/create_and_check.yml
+++ b/tests/testcases/create_and_check.yml
@@ -4,7 +4,6 @@
     id: create_and_check
     variables:
         - uid: 9001
-        - token: XXX
         - device_sn: "TESTCASE_CREATE_XXX"
     base_url: "http://127.0.0.1:5000"