diff --git a/internal/health/check/docker.go b/internal/health/check/docker.go
index 49462827..5d1d4cff 100644
--- a/internal/health/check/docker.go
+++ b/internal/health/check/docker.go
@@ -35,7 +35,7 @@ func NewDockerHealthcheckState(client *docker.SharedClient, containerId string)
 	}
 }
 
-func Docker(ctx context.Context, state *DockerHealthcheckState, containerId string, timeout time.Duration) (types.HealthCheckResult, error) {
+func Docker(ctx context.Context, state *DockerHealthcheckState, timeout time.Duration) (types.HealthCheckResult, error) {
 	if state.numDockerFailures > dockerFailuresThreshold {
 		return types.HealthCheckResult{}, ErrDockerHealthCheckFailedTooManyTimes
 	}
@@ -44,7 +44,7 @@ func Docker(ctx context.Context, state *DockerHealthcheckState, containerId stri
 	defer cancel()
 
 	// the actual inspect response is intercepted and returned as RequestInterceptedError
-	_, err := state.client.ContainerInspect(ctx, containerId, client.ContainerInspectOptions{})
+	_, err := state.client.ContainerInspect(ctx, state.containerId, client.ContainerInspectOptions{})
 
 	var interceptedErr *httputils.RequestInterceptedError
 	if !httputils.AsRequestInterceptedError(err, &interceptedErr) {
diff --git a/internal/health/monitor/new.go b/internal/health/monitor/new.go
index d7e99eb5..5c2913de 100644
--- a/internal/health/monitor/new.go
+++ b/internal/health/monitor/new.go
@@ -98,7 +98,7 @@ func NewDockerHealthMonitor(config types.HealthCheckConfig, client *docker.Share
 
 	var mon monitor
 	mon.init(displayURL, config, func(u *url.URL) (result Result, err error) {
-		result, err = healthcheck.Docker(mon.Context(), state, containerId, config.Timeout)
+		result, err = healthcheck.Docker(mon.Context(), state, config.Timeout)
 		if err != nil {
 			if isFirstFailure {
 				isFirstFailure = false