diff --git a/testsuite/output-options_test.py b/testsuite/output-options_test.py
index 1d57c086a..61a4d4ba9 100644
--- a/testsuite/output-options_test.py
+++ b/testsuite/output-options_test.py
@@ -108,7 +108,7 @@ def out(*args, want_rc=0, env=None, text=True):
 plain = out('-a', '--stats', f'{src}/', f'{TODIR}/').stdout
 rmtree(TODIR)
 human = out('-a', '-h', '--stats', f'{src}/', f'{TODIR}/').stdout
-suffix_re = r'Total file size: [\d.]+[KMG]'
+suffix_re = r'Total file size: [\d.,]+[KMG]'
 if not re.search(suffix_re, human):
     test_fail(f"-h did not use a human-readable unit suffix:\n{human}")
 if re.search(suffix_re, plain):