diff --git a/jwst/source_catalog/source_catalog_step.py b/jwst/source_catalog/source_catalog_step.py
index 6729ea81b6..437895f16e 100755
--- a/jwst/source_catalog/source_catalog_step.py
+++ b/jwst/source_catalog/source_catalog_step.py
@@ -32,7 +32,7 @@ class SourceCatalogStep(Step):
         ci1_star_threshold = float(default=2.0)  # CI 1 star threshold
         ci2_star_threshold = float(default=1.8)  # CI 2 star threshold
         suffix = string(default='cat')        # Default suffix for output files
-    """ # noqa: E501
+    """  # noqa: E501
 
     reference_file_types = ["apcorr", "abvegaoffset"]