diff --git a/mobile/mobile_test.go b/mobile/mobile_test.go
index f16a893..4a2db48 100644
--- a/mobile/mobile_test.go
+++ b/mobile/mobile_test.go
@@ -53,6 +53,8 @@ func resetMobileGlobals(t *testing.T) {
 
 var clientRunWithReady = runClientWithReady //nolint:gochecknoglobals // package-level state intentional
 
+const testRoomID = "room"
+
 var (
 	errMobileCheckFailed = errors.New("check failed")
 	errMobileRunFailed   = errors.New("run failed")
@@ -128,7 +130,7 @@ func TestNormalizeBuildRoomAndClamp(t *testing.T) {
 	if got := buildRoomURL("telemost", "abc"); got != "abc" {
 		t.Fatalf("telemost room URL = %q", got)
 	}
-	if got := buildRoomURL(carrierWBStream, "room"); got != "room" {
+	if got := buildRoomURL(carrierWBStream, testRoomID); got != testRoomID {
 		t.Fatalf("wbstream room URL = %q", got)
 	}
 
@@ -140,23 +142,23 @@ func TestNormalizeBuildRoomAndClamp(t *testing.T) {
 func TestStartValidation(t *testing.T) {
 	resetMobileGlobals(t)
 
-	if err := startWithConfig("", dataTransport, "room", "client", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errCarrierRequired) { //nolint:lll // long test description
+	if err := startWithConfig("", dataTransport, testRoomID, "client", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errCarrierRequired) { //nolint:lll // long test description
 		t.Fatalf("startWithConfig(missing carrier) = %v", err)
 	}
 	if err := startWithConfig("telemost", dataTransport, "", "client", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errRoomIDRequired) { //nolint:lll // long test description
 		t.Fatalf("startWithConfig(missing room) = %v", err)
 	}
-	if err := startWithConfig("jitsi", dataTransport, "room", "", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errClientIDRequired) { //nolint:lll // long test description
+	if err := startWithConfig("jitsi", dataTransport, testRoomID, "", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errClientIDRequired) { //nolint:lll // long test description
 		t.Fatalf("startWithConfig(missing client) = %v", err)
 	}
-	if err := startWithConfig("jitsi", dataTransport, "room", "client", "", 1080, "", "", mobileConfig{}); !errors.Is(err, errKeyHexRequired) { //nolint:lll // long test description
+	if err := startWithConfig("jitsi", dataTransport, testRoomID, "client", "", 1080, "", "", mobileConfig{}); !errors.Is(err, errKeyHexRequired) { //nolint:lll // long test description
 		t.Fatalf("startWithConfig(missing key) = %v", err)
 	}
 
 	mu.Lock()
 	cancel = func() {}
 	mu.Unlock()
-	if err := startWithConfig("jitsi", dataTransport, "room", "client", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errAlreadyRunning) { //nolint:lll // long test description
+	if err := startWithConfig("jitsi", dataTransport, testRoomID, "client", "key", 1080, "", "", mobileConfig{}); !errors.Is(err, errAlreadyRunning) { //nolint:lll // long test description
 		t.Fatalf("startWithConfig(running) = %v", err)
 	}
 	resetMobileGlobals(t)
@@ -173,7 +175,7 @@ func TestStartWithInjectedRunnerLifecycle(t *testing.T) {
 	runClientWithReady = func(ctx context.Context, cfg client.Config, onReady func()) error {
 		opts, _ := cfg.TransportOptions.(vp8channel.Options)
 		if cfg.Transport != dataTransport || cfg.Carrier != "jitsi" ||
-			cfg.RoomURL != "room" || cfg.DeviceID != "client" || cfg.LocalAddr != "127.0.0.1:1080" ||
+			cfg.RoomURL != testRoomID || cfg.DeviceID != "client" || cfg.LocalAddr != "127.0.0.1:1080" ||
 			cfg.DNSServer != defaultDNSServer || opts.FPS != 60 || opts.BatchSize != 8 ||
 			cfg.Liveness.Interval != 2500*time.Millisecond ||
 			cfg.Liveness.Timeout != 750*time.Millisecond ||
@@ -190,7 +192,7 @@ func TestStartWithInjectedRunnerLifecycle(t *testing.T) {
 		return ctx.Err()
 	}
 
-	if err := StartWithTransport("jitsi", "dc", "room", "client", "key", 1080, "", ""); err != nil {
+	if err := StartWithTransport("jitsi", "dc", testRoomID, "client", "key", 1080, "", ""); err != nil {
 		t.Fatalf("StartWithTransport() error = %v", err)
 	}
 	if !IsRunning() {
@@ -213,7 +215,7 @@ func TestStartUsesDefaultsAndCheckWithInjectedRunner(t *testing.T) {
 	})
 
 	runClientWithReady = func(ctx context.Context, cfg client.Config, onReady func()) error {
-		if cfg.Transport != defaultTransport || cfg.RoomURL != "room" ||
+		if cfg.Transport != defaultTransport || cfg.RoomURL != testRoomID ||
 			cfg.LocalAddr != "127.0.0.1:1081" || cfg.SOCKSUser != "u" || cfg.SOCKSPass != "p" ||
 			cfg.Liveness.Interval != control.DefaultInterval ||
 			cfg.Liveness.Timeout != control.DefaultTimeout ||
@@ -226,7 +228,7 @@ func TestStartUsesDefaultsAndCheckWithInjectedRunner(t *testing.T) {
 		return ctx.Err()
 	}
 
-	if err := Start("telemost", "room", "client", "key", 1081, "u", "p"); err != nil {
+	if err := Start("telemost", testRoomID, "client", "key", 1081, "u", "p"); err != nil {
 		t.Fatalf("Start() error = %v", err)
 	}
 	if err := WaitReady(100); err != nil {
@@ -248,7 +250,7 @@ func TestStartUsesDefaultsAndCheckWithInjectedRunner(t *testing.T) {
 		<-ctx.Done()
 		return nil
 	}
-	elapsed, err := Check("jitsi", "dc", "room", "client", "key", 1082, 100, -1, 999)
+	elapsed, err := Check("jitsi", "dc", testRoomID, "client", "key", 1082, 100, -1, 999)
 	if err != nil {
 		t.Fatalf("Check() error = %v", err)
 	}
@@ -272,7 +274,7 @@ func TestPingPassesLiveness(t *testing.T) {
 		return nil
 	}
 
-	_, _ = Ping("jitsi", "dc", "room", "client", "key", 1085, 100, "http://127.0.0.1/", 30, 1)
+	_, _ = Ping("jitsi", "dc", testRoomID, "client", "key", 1085, 100, "http://127.0.0.1/", 30, 1)
 	select {
 	case got := <-seen:
 		if got.Interval != 4000*time.Millisecond || got.Timeout != 1500*time.Millisecond || got.Failures != 6 {
@@ -293,7 +295,7 @@ func TestCheckTimeoutAndRunError(t *testing.T) {
 		<-ctx.Done()
 		return nil
 	}
-	if _, err := Check("telemost", defaultTransport, "room", "client", "key", 1083, 1, 30, 1); !errors.Is(err, errStartTimedOut) { //nolint:lll // long test description
+	if _, err := Check("telemost", defaultTransport, testRoomID, "client", "key", 1083, 1, 30, 1); !errors.Is(err, errStartTimedOut) { //nolint:lll // long test description
 		t.Fatalf("Check(timeout) error = %v, want %v", err, errStartTimedOut)
 	}
 
@@ -301,7 +303,9 @@ func TestCheckTimeoutAndRunError(t *testing.T) {
 	runClientWithReady = func(context.Context, client.Config, func()) error {
 		return want
 	}
-	if _, err := Check("telemost", defaultTransport, "room", "client", "key", 1084, 100, 30, 1); !errors.Is(err, want) {
+	if _, err := Check(
+		"telemost", defaultTransport, testRoomID, "client", "key", 1084, 100, 30, 1,
+	); !errors.Is(err, want) {
 		t.Fatalf("Check(run error) = %v, want %v", err, want)
 	}
 }