diff --git a/nixos/tests/prometheus-exporters.nix b/nixos/tests/prometheus-exporters.nix
index 8369d6a497ac..d42a9e303996 100644
--- a/nixos/tests/prometheus-exporters.nix
+++ b/nixos/tests/prometheus-exporters.nix
@@ -512,7 +512,7 @@ let
         wait_for_unit("knot.service")
         wait_for_unit("prometheus-knot-exporter.service")
         wait_for_open_port(9433)
-        succeed("curl -sSf 'localhost:9433' | grep 'knot_server_zone_count 1.0'")
+        succeed("curl -sSf 'localhost:9433' | grep '2\.019031301'")
       '';
     };