diff --git a/bin/tests/system/cookie/cookie_ans.py b/bin/tests/system/cookie/cookie_ans.py
index 3b6f0406f2..59f3d1fdf5 100644
--- a/bin/tests/system/cookie/cookie_ans.py
+++ b/bin/tests/system/cookie/cookie_ans.py
@@ -44,12 +44,8 @@ def _add_cookie(qctx: QueryContext) -> None:
     for o in qctx.query.options:
         if o.otype == dns.edns.OptionType.COOKIE:
             cookie = o
-            try:
-                if len(cookie.server) == 0:
-                    cookie.server = cookie.client
-            except AttributeError:  # dnspython<2.7.0 compat
-                if len(o.data) == 8:
-                    cookie.data *= 2
+            if len(cookie.server) == 0:
+                cookie.server = cookie.client
 
             qctx.response.use_edns(options=[cookie])
             return
diff --git a/bin/tests/system/resend_loop/ans3/ans.py b/bin/tests/system/resend_loop/ans3/ans.py
index 47275bf377..2b8cf4d018 100644
--- a/bin/tests/system/resend_loop/ans3/ans.py
+++ b/bin/tests/system/resend_loop/ans3/ans.py
@@ -32,12 +32,8 @@ def _get_cookie(qctx: QueryContext):
     for o in qctx.query.options:
         if o.otype == dns.edns.OptionType.COOKIE:
             cookie = o
-            try:
-                if len(cookie.server) == 0:
-                    cookie.server = b"\x11\x22\x33\x44\x55\x66\x77\x88"
-            except AttributeError:  # dnspython<2.7.0 compat
-                if len(o.data) == 8:
-                    cookie.data *= 2
+            if len(cookie.server) == 0:
+                cookie.server = b"\x11\x22\x33\x44\x55\x66\x77\x88"
 
             return cookie