diff --git a/pkgs/by-name/ro/roadrunner/package.nix b/pkgs/by-name/ro/roadrunner/package.nix
index 108c83e54386..9df0b8e6c3fd 100644
--- a/pkgs/by-name/ro/roadrunner/package.nix
+++ b/pkgs/by-name/ro/roadrunner/package.nix
@@ -42,17 +42,6 @@ buildGoModule (finalAttrs: {
       --fish <($out/bin/rr completion fish)
   '';
 
-  postPatch = ''
-    substituteInPlace internal/rpc/client_test.go \
-      --replace "127.0.0.1:55555" "127.0.0.1:55554"
-
-    substituteInPlace internal/rpc/test/config_rpc_ok.yaml \
-      --replace "127.0.0.1:55555" "127.0.0.1:55554"
-
-    substituteInPlace internal/rpc/test/config_rpc_conn_err.yaml \
-      --replace "127.0.0.1:0" "127.0.0.1:55554"
-  '';
-
   __darwinAllowLocalNetworking = true;
 
   doInstallCheck = true;