diff --git a/source/tests/pt/model/test_permutation.py b/source/tests/pt/model/test_permutation.py
index 0061d6d1ed..911df2a331 100644
--- a/source/tests/pt/model/test_permutation.py
+++ b/source/tests/pt/model/test_permutation.py
@@ -38,9 +38,9 @@
 
 model_zbl = {
     "type_map": {
-        "zbl":["O", "H", "B"],
-        "pairtab":["B", "O", "H"],
-        "dp": ["H", "B", "O"]
+        "zbl": ["O", "H", "B"],
+        "pairtab": ["B", "O", "H"],
+        "dp": ["H", "B", "O"],
     },
     "use_srtab": "source/tests/pt/model/water/data/zbl_tab_potential/H2O_tab_potential.txt",
     "smin_alpha": 0.1,