diff --git a/bin/python/isc/Makefile.in b/bin/python/isc/Makefile.in
index f535e9e53e..bdc11eba0c 100644
--- a/bin/python/isc/Makefile.in
+++ b/bin/python/isc/Makefile.in
@@ -23,7 +23,8 @@ SUBDIRS	=	tests
 PYTHON	=	@PYTHON@
 
 PYSRCS =	__init__.py dnskey.py eventlist.py keydict.py \
-		keyevent.py keyzone.py
+		keyevent.py keyzone.py checkds.py coverage.py \
+		utils.py
 
 @BIND9_MAKE_RULES@
 
@@ -37,4 +38,4 @@ clean distclean::
 	rm -rf __pycache__ build
 
 distclean::
-	rm -Rf utils.py
+	rm -rf ${PYSRCS}
diff --git a/bin/python/isc/tests/Makefile.in b/bin/python/isc/tests/Makefile.in
index 1fdf3f98e4..2a775f3603 100644
--- a/bin/python/isc/tests/Makefile.in
+++ b/bin/python/isc/tests/Makefile.in
@@ -30,4 +30,7 @@ check test:
 	done
 
 clean distclean::
-	rm -f *.pyc
+	rm -rf *.pyc __pycache__ 
+
+distclean::
+	rm -f dnskey_test.py