diff --git a/xfel_calibrate/calibrate.py b/xfel_calibrate/calibrate.py
index 6f4acaa4cb3621a78da6f66fce783de7b6b3c206..1e5066c3958b41bc730cbafce7284447d2e87c9a 100755
--- a/xfel_calibrate/calibrate.py
+++ b/xfel_calibrate/calibrate.py
@@ -392,7 +392,7 @@ def concurrent_run(temp_path, nb, nbname, args, cparm=None, cval=None,
         with open("{}/finalize.sh".format(temp_path), "w") as finfile:
             finfile.write("#!/bin/tcsh\n")
             finfile.write("module load texlive/2017\n")
-            finfile.write('if [[ `which python` != *"karabo"* ]];\n')
+            finfile.write("if [[ `which python` != *'karabo'* ]];\n")
             finfile.write("then module load anaconda/3; fi\n")
             finfile.write("echo 'Running finalize script'\n")
             finfile.write(