diff --git a/pkgs/by-name/ni/nixseparatedebuginfod2/package.nix b/pkgs/by-name/ni/nixseparatedebuginfod2/package.nix
index 42f9613df285..d01deb4f7902 100644
--- a/pkgs/by-name/ni/nixseparatedebuginfod2/package.nix
+++ b/pkgs/by-name/ni/nixseparatedebuginfod2/package.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
   passthru.tests = { inherit (nixosTests) nixseparatedebuginfod2; };
 
   # flaky tests
-  checkFlags = [ "--skip substituter::http" ];
+  checkFlags = [ "--skip=substituter::http" ];
 
   meta = {
     description = "Downloads and provides debug symbols and source code for nix derivations to gdb and other debuginfod-capable debuggers as needed";