diff --git a/integration/derp_verify_endpoint_test.go b/integration/derp_verify_endpoint_test.go
index 0297e280..912ad6cb 100644
--- a/integration/derp_verify_endpoint_test.go
+++ b/integration/derp_verify_endpoint_test.go
@@ -13,6 +13,7 @@ import (
 	"github.com/juanfont/headscale/integration/hsic"
 	"github.com/juanfont/headscale/integration/integrationutil"
 	"github.com/juanfont/headscale/integration/tsic"
+	"tailscale.com/tailcfg"
 )
 
 func TestDERPVerifyEndpoint(t *testing.T) {
@@ -44,25 +45,32 @@ func TestDERPVerifyEndpoint(t *testing.T) {
 	)
 	assertNoErr(t, err)
 
-	derpConfig := "regions:\n"
-	derpConfig += "  900:\n"
-	derpConfig += "    regionid: 900\n"
-	derpConfig += "    regioncode: test-derpverify\n"
-	derpConfig += "    regionname: TestDerpVerify\n"
-	derpConfig += "    nodes:\n"
-	derpConfig += "      - name: TestDerpVerify\n"
-	derpConfig += "        regionid: 900\n"
-	derpConfig += "        hostname: " + derper.GetHostname() + "\n"
-	derpConfig += "        stunport: " + derper.GetSTUNPort() + "\n"
-	derpConfig += "        stunonly: false\n"
-	derpConfig += "        derpport: " + derper.GetDERPPort() + "\n"
+	derpMap := tailcfg.DERPMap{
+		Regions: map[int]*tailcfg.DERPRegion{
+			900: {
+				RegionID:   900,
+				RegionCode: "test-derpverify",
+				RegionName: "TestDerpVerify",
+				Nodes: []*tailcfg.DERPNode{
+					{
+						Name:     "TestDerpVerify",
+						RegionID: 900,
+						HostName: derper.GetHostname(),
+						STUNPort: derper.GetSTUNPort(),
+						STUNOnly: false,
+						DERPPort: derper.GetDERPPort(),
+					},
+				},
+			},
+		},
+	}
 
 	headscale, err := scenario.Headscale(
 		hsic.WithHostname(hostname),
 		hsic.WithPort(headscalePort),
 		hsic.WithCustomTLS(certHeadscale, keyHeadscale),
 		hsic.WithHostnameAsServerURL(),
-		hsic.WithCustomDERPServerOnly([]byte(derpConfig)),
+		hsic.WithDERPConfig(derpMap),
 	)
 	assertNoErrHeadscaleEnv(t, err)
 
diff --git a/integration/dsic/dsic.go b/integration/dsic/dsic.go
index 59e9f9af..4ea659c9 100644
--- a/integration/dsic/dsic.go
+++ b/integration/dsic/dsic.go
@@ -267,18 +267,18 @@ func (t *DERPServerInContainer) GetHostname() string {
 }
 
 // GetSTUNPort returns the STUN port of the DERPer instance.
-func (t *DERPServerInContainer) GetSTUNPort() string {
-	return strconv.Itoa(t.stunPort)
+func (t *DERPServerInContainer) GetSTUNPort() int {
+	return t.stunPort
 }
 
 // GetDERPPort returns the DERP port of the DERPer instance.
-func (t *DERPServerInContainer) GetDERPPort() string {
-	return strconv.Itoa(t.derpPort)
+func (t *DERPServerInContainer) GetDERPPort() int {
+	return t.derpPort
 }
 
 // WaitForRunning blocks until the DERPer instance is ready to be used.
 func (t *DERPServerInContainer) WaitForRunning() error {
-	url := "https://" + net.JoinHostPort(t.GetHostname(), t.GetDERPPort()) + "/"
+	url := "https://" + net.JoinHostPort(t.GetHostname(), strconv.Itoa(t.GetDERPPort())) + "/"
 	log.Printf("waiting for DERPer to be ready at %s", url)
 
 	insecureTransport := http.DefaultTransport.(*http.Transport).Clone()      //nolint
diff --git a/integration/hsic/hsic.go b/integration/hsic/hsic.go
index 97e86d1a..3b4d0905 100644
--- a/integration/hsic/hsic.go
+++ b/integration/hsic/hsic.go
@@ -25,6 +25,7 @@ import (
 	"github.com/juanfont/headscale/integration/integrationutil"
 	"github.com/ory/dockertest/v3"
 	"github.com/ory/dockertest/v3/docker"
+	"tailscale.com/tailcfg"
 )
 
 const (
@@ -216,10 +217,17 @@ func WithEmbeddedDERPServerOnly() Option {
 	}
 }
 
-// WithCustomDERPServerOnly configures Headscale use a custom
+// WithDERPConfig configures Headscale use a custom
 // DERP server only.
-func WithCustomDERPServerOnly(contents []byte) Option {
+func WithDERPConfig(derpMap tailcfg.DERPMap) Option {
 	return func(hsic *HeadscaleInContainer) {
+		contents, err := json.Marshal(derpMap)
+		if err != nil {
+			log.Fatalf("failed to marshal DERP map: %s", err)
+
+			return
+		}
+
 		hsic.env["HEADSCALE_DERP_PATHS"] = "/etc/headscale/derp.yml"
 		hsic.filesInContainer = append(hsic.filesInContainer,
 			fileInContainer{