diff --git a/tests/export_pngtest.py b/tests/export_pngtest.py
index f34983c4d9..3e645b36c5 100644
--- a/tests/export_pngtest.py
+++ b/tests/export_pngtest.py
@@ -82,7 +82,7 @@ def createImport(inputfile, scadfile):
 if result != 0:
     failquit('OpenSCAD failed with return code ' + str(result))
 
-convert_cmd = gs_cmd + ["-sOutputFile=\"" + pngfile + "\"", exportfile]
+convert_cmd = gs_cmd + ["-sOutputFile=" + pngfile, exportfile]
 print('Running Converter:', ' '.join(convert_cmd), file=sys.stderr)
 result = subprocess.call(convert_cmd)
 if result != 0: