diff --git a/Code/Mantid/Testing/SystemTests/tests/analysis/ReflectometryQuickCombineMulti.py b/Code/Mantid/Testing/SystemTests/tests/analysis/ReflectometryQuickCombineMulti.py
index e42ffe890ccf118f128d17051e4c2d9c436b6a46..f79fe5700ecc404fb9328d015da97d78ff753535 100644
--- a/Code/Mantid/Testing/SystemTests/tests/analysis/ReflectometryQuickCombineMulti.py
+++ b/Code/Mantid/Testing/SystemTests/tests/analysis/ReflectometryQuickCombineMulti.py
@@ -22,7 +22,7 @@ class ReflectometryQuickCombineMulti(stresstesting.MantidStressTest):
             for transmissionNumber in transmissionNumbers:
                 LoadISISNexus(Filename=str(transmissionNumber), OutputWorkspace=str(transmissionNumber))
 
-            transmissionRuns = ",".join([str(tn) for tn in transmissionNumbers]))
+            transmissionRuns = ",".join([str(tn) for tn in transmissionNumbers])
             # Run quick
             quick.quick(str(runNumber), trans=transmissionRuns, theta=incidentAngle)
         finally: