diff --git a/internal/service/testing_hooks_gitops.go b/internal/service/testing_hooks_gitops.go
index b6b701d..5a77ebe 100644
--- a/internal/service/testing_hooks_gitops.go
+++ b/internal/service/testing_hooks_gitops.go
@@ -65,9 +65,9 @@ func TestHookMaybeStartGitOpsSnapshot(ctx context.Context, cfg config.Config, ex
 // Signature: TestHookMaybeStartGitOpsSnapshotWithRunner(ctx context.Context, cfg config.Config, exporter *metrics.Exporter, logger *log.Logger, lastRun *time.Time, running bool, done chan<- struct{}, runner TestHookGitOpsRunner) bool.
 // Why: the scrape is asynchronous, so split-module tests need a seam that keeps
 // fake kubectl behavior installed until the goroutine exits.
-func TestHookMaybeStartGitOpsSnapshotWithRunner(ctx context.Context, cfg config.Config, exporter *metrics.Exporter, logger *log.Logger, lastRun *time.Time, running bool, done chan<- struct{}, runner TestHookGitOpsRunner) bool {
+func TestHookMaybeStartGitOpsSnapshotWithRunner(ctx context.Context, cfg config.Config, exporter *metrics.Exporter, logger *log.Logger, lastRun *time.Time, running bool, done chan<- struct{}, runner ...TestHookGitOpsRunner) bool {
 	original := gitOpsKubectlOutput
-	gitOpsKubectlOutput = runner
+	gitOpsKubectlOutput = runner[0]
 	proxyDone := make(chan struct{}, 1)
 	d := &Daemon{cfg: cfg, exporter: exporter, log: logger}
 	started := d.maybeStartGitOpsSnapshot(ctx, lastRun, running, proxyDone)