diff --git a/Control/AthenaConfiguration/python/ComponentAccumulatorTest.py b/Control/AthenaConfiguration/python/ComponentAccumulatorTest.py
index b5afb081253ac56e48c437370baa986f8c1d8094..830ba6e9fe0fca4238a653e3e0e34ceb40a2c2ef 100644
--- a/Control/AthenaConfiguration/python/ComponentAccumulatorTest.py
+++ b/Control/AthenaConfiguration/python/ComponentAccumulatorTest.py
@@ -484,7 +484,7 @@ class TestSequencesMerging( unittest.TestCase ):
         ca2 = OutputStreamCfg(ConfigFlags, "RDO", ItemList = [
             "SCT_RDO_Container#SCT_RDOs",
             "InDetSimDataCollection#SCT_SDO_Map"	    
-	])
+        ])
         ca2.printConfig()
 
         print("after merge")