diff --git a/pkg/bench/query_runner.go b/pkg/bench/query_runner.go
index 362e1a81c..20a3eabd4 100644
--- a/pkg/bench/query_runner.go
+++ b/pkg/bench/query_runner.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"flag"
 	"math/rand"
-	"net/http"
 	"sync"
 	"time"
 
@@ -19,6 +18,8 @@ import (
 	config_util "github.com/prometheus/common/config"
 	"github.com/thanos-io/thanos/pkg/discovery/dns"
 	"github.com/thanos-io/thanos/pkg/extprom"
+
+	"github.com/cortexproject/cortex-tools/pkg/httpmiddleware"
 )
 
 type QueryConfig struct {
@@ -139,24 +140,12 @@ func (q *queryRunner) queryWorker(queryChan chan query) {
 	}
 }
 
-type tenantIDRoundTripper struct {
-	tenantName string
-	next       http.RoundTripper
-}
-
-func (r *tenantIDRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
-	if r.tenantName != "" {
-		req.Header.Set("X-Scope-OrgID", r.tenantName)
-	}
-	return r.next.RoundTrip(req)
-}
-
 func newQueryClient(url, tenantName, username, password string) (v1.API, error) {
 	apiClient, err := api.NewClient(api.Config{
 		Address: url,
-		RoundTripper: &tenantIDRoundTripper{
-			tenantName: tenantName,
-			next:       config_util.NewBasicAuthRoundTripper(username, config_util.Secret(password), "", api.DefaultRoundTripper),
+		RoundTripper: &httpmiddleware.TenantIDRoundTripper{
+			TenantName: tenantName,
+			Next:       config_util.NewBasicAuthRoundTripper(username, config_util.Secret(password), "", api.DefaultRoundTripper),
 		},
 	})
 
diff --git a/pkg/commands/analyse_prometheus.go b/pkg/commands/analyse_prometheus.go
index b5fa42ca6..068bfe842 100644
--- a/pkg/commands/analyse_prometheus.go
+++ b/pkg/commands/analyse_prometheus.go
@@ -18,6 +18,7 @@ import (
 	"gopkg.in/alecthomas/kingpin.v2"
 
 	"github.com/cortexproject/cortex-tools/pkg/analyse"
+	"github.com/cortexproject/cortex-tools/pkg/httpmiddleware"
 )
 
 type PrometheusAnalyseCommand struct {
@@ -72,8 +73,11 @@ func (cmd *PrometheusAnalyseCommand) run(_ *kingpin.ParseContext) error {
 		rt = config.NewBasicAuthRoundTripper(cmd.username, config.Secret(cmd.password), "", api.DefaultRoundTripper)
 	}
 	promClient, err := api.NewClient(api.Config{
-		Address:      cmd.address,
-		RoundTripper: rt,
+		Address: cmd.address,
+		RoundTripper: &httpmiddleware.TenantIDRoundTripper{
+			TenantName: cmd.username,
+			Next:       rt,
+		},
 	})
 	if err != nil {
 		return err
diff --git a/pkg/httpmiddleware/roundtripper.go b/pkg/httpmiddleware/roundtripper.go
new file mode 100644
index 000000000..3a2770b50
--- /dev/null
+++ b/pkg/httpmiddleware/roundtripper.go
@@ -0,0 +1,15 @@
+package httpmiddleware
+
+import "net/http"
+
+type TenantIDRoundTripper struct {
+	TenantName string
+	Next       http.RoundTripper
+}
+
+func (r *TenantIDRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if r.TenantName != "" {
+		req.Header.Set("X-Scope-OrgID", r.TenantName)
+	}
+	return r.Next.RoundTrip(req)
+}