diff --git a/python/plugins/processing/tests/AlgorithmsTestBase.py b/python/plugins/processing/tests/AlgorithmsTestBase.py
index 16bc8fc1b86..04da19e1d2d 100644
--- a/python/plugins/processing/tests/AlgorithmsTestBase.py
+++ b/python/plugins/processing/tests/AlgorithmsTestBase.py
@@ -99,7 +99,7 @@ class AlgorithmsTest:
 
         expectFailure = False
         if 'expectedFailure' in defs:
-            exec(('\n'.join(defs['expectedFailure'][:-1])), globals(), locals())
+            exec('\n'.join(defs['expectedFailure'][:-1]), globals(), locals())
             expectFailure = eval(defs['expectedFailure'][-1])
 
         def doCheck():