diff --git a/bin/tests/system/dnssec/tests_nsec3.py b/bin/tests/system/dnssec/tests_nsec3.py
index b06a3772fa..1f01074edb 100755
--- a/bin/tests/system/dnssec/tests_nsec3.py
+++ b/bin/tests/system/dnssec/tests_nsec3.py
@@ -27,12 +27,12 @@ import dns.rdataclass
 import dns.rdatatype
 import dns.rrset
 
-from hypothesis import assume, given
-
 from isctest.hypothesis.strategies import dns_names
 import isctest
 import isctest.name
 
+from hypothesis import assume, given
+
 SUFFIX = dns.name.from_text("nsec3.example.")
 AUTH = "10.53.0.3"
 RESOLVER = "10.53.0.4"