diff --git a/libgimp/tests/libgimp-run-python-test.py b/libgimp/tests/libgimp-run-python-test.py
index 89e9b2ce2f..fef653c309 100644
--- a/libgimp/tests/libgimp-run-python-test.py
+++ b/libgimp/tests/libgimp-run-python-test.py
@@ -20,14 +20,14 @@ if first_char != '#':
   # Note: I don't actually care that it's a shebang, just that it's a comment,
   # hence a useless line, because I'm going to remove it and replace it with
   # gimp_assert() import line.
-  # This will make much easier to debug tests with meaningful line numbers.    
+  # This will make much easier to debug tests with meaningful line numbers.
   print(f"ERROR: file '{TEST_FILE}' should start with a shebang: #!/usr/bin/env python3")
   sys.exit(1)
-        
+
 header = f"""import os; import sys; sys.path.insert(0, '{SRC_DIR}'); from pygimp.utils import gimp_assert;
 import pygimp.utils; pygimp.utils.gimp_test_filename = '{TEST_FILE}'"""
 
 with open(TEST_FILE, 'r') as f:
   content = f.readlines()
-cmd = header + ''.join(content[1:])    
+cmd = header + ''.join(content[1:])
 subprocess.run([sys.executable, GIMP_EXE, "-nis", "--batch-interpreter", "python-fu-eval", "-b", cmd, "--quit"], check=True)