diff --git a/test/test_api/test_api.py b/test/test_api/test_api.py
index 926f41a2..72ff57e3 100644
--- a/test/test_api/test_api.py
+++ b/test/test_api/test_api.py
@@ -9,6 +9,13 @@ from jedi._compatibility import is_py3
 from pytest import raises
 
 
+def _clear_last_exception_fields_in_sys():
+    import sys
+    sys.last_type = None
+    sys.last_value = None
+    sys.last_traceback = None
+
+
 def test_preload_modules():
     def check_loaded(*modules):
         # +1 for None module (currently used)
@@ -20,6 +27,7 @@ def test_preload_modules():
     temp_cache, cache.parser_cache = cache.parser_cache, {}
     parser_cache = cache.parser_cache
 
+    _clear_last_exception_fields_in_sys()
     api.preload_module('sys')
     check_loaded()  # compiled (c_builtin) modules shouldn't be in the cache.
     api.preload_module('json', 'token')