diff --git a/debian/rules b/debian/rules
index 7c57d60..de5c9b0 100644
--- a/debian/rules
+++ b/debian/rules
@@ -9,9 +9,9 @@ export PYBUILD_TEST_PYTEST=1
 export PYBUILD_TEST_ARGS={dir}/tests/
 
 override_dh_auto_test:
-    # the test suite does not 100% pass at present,
-    # but the output is useful documentation for users
-    (dh_auto_test; echo $?) > test-results
+	# the test suite does not 100% pass at present,
+	# but the output is useful documentation for users
+	(dh_auto_test; echo $?) > test-results
 
 %:
 	dh $@ --with python3 --buildsystem=pybuild