diff --git a/rsocket-ktor/server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketConnectionTest.kt b/rsocket-ktor/server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketConnectionTest.kt
index b1d68683..83c42278 100644
--- a/rsocket-ktor/server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketConnectionTest.kt
+++ b/rsocket-ktor/server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketConnectionTest.kt
@@ -26,7 +26,6 @@ import io.rsocket.kotlin.ktor.client.*
 import io.rsocket.kotlin.ktor.server.*
 import io.rsocket.kotlin.payload.*
 import io.rsocket.kotlin.test.*
-import io.rsocket.kotlin.transport.tests.*
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.*
 import kotlin.test.*
@@ -38,7 +37,6 @@ import io.rsocket.kotlin.ktor.client.RSocketSupport as ClientRSocketSupport
 import io.rsocket.kotlin.ktor.server.RSocketSupport as ServerRSocketSupport
 
 class WebSocketConnectionTest : SuspendTest, TestWithLeakCheck {
-    private val port = PortProvider.next()
     private val client = HttpClient(ClientCIO) {
         install(ClientWebSockets)
         install(ClientRSocketSupport) {
@@ -52,7 +50,7 @@ class WebSocketConnectionTest : SuspendTest, TestWithLeakCheck {
 
     private var responderJob: Job? = null
 
-    private val server = embeddedServer(ServerCIO, port) {
+    private val server = embeddedServer(ServerCIO, port = 0) {
         install(ServerWebSockets)
         install(ServerRSocketSupport) {
             server = TestServer()
@@ -87,6 +85,7 @@ class WebSocketConnectionTest : SuspendTest, TestWithLeakCheck {
 
     @Test
     fun testWorks() = test {
+        val port = server.resolvedConnectors().single().port
         val rSocket = client.rSocket(port = port)
         val requesterJob = rSocket.coroutineContext.job
 
diff --git a/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpServerTest.kt b/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpServerTest.kt
index f7065fbf..95667dfb 100644
--- a/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpServerTest.kt
+++ b/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpServerTest.kt
@@ -19,16 +19,17 @@ package io.rsocket.kotlin.transport.ktor.tcp
 import io.ktor.network.sockets.*
 import io.rsocket.kotlin.*
 import io.rsocket.kotlin.test.*
-import io.rsocket.kotlin.transport.tests.*
 import kotlinx.coroutines.*
 import kotlin.test.*
 
 class TcpServerTest : SuspendTest, TestWithLeakCheck {
     private val testJob = Job()
     private val testContext = testJob + TestExceptionHandler
-    private val address = InetSocketAddress("0.0.0.0", PortProvider.next())
-    private val serverTransport = TcpServerTransport(address)
-    private val clientTransport = TcpClientTransport(address, testContext)
+    private val serverTransport = TcpServerTransport()
+    private suspend fun clientTransport(server: TcpServer) = TcpClientTransport(
+        server.serverSocket.await().localAddress as InetSocketAddress,
+        testContext
+    )
 
     override suspend fun after() {
         testJob.cancelAndJoin()
@@ -50,7 +51,7 @@ class TcpServerTest : SuspendTest, TestWithLeakCheck {
                     payload(text)
                 }
             }
-        }.connect(clientTransport)
+        }.connect(clientTransport(server))
 
         val client1 = newClient("ok")
         client1.requestResponse(payload("ok")).close()
@@ -86,7 +87,7 @@ class TcpServerTest : SuspendTest, TestWithLeakCheck {
             }.also { handlers += it }
         }.also { it.serverSocket.await() }
 
-        suspend fun newClient() = TestConnector().connect(clientTransport)
+        suspend fun newClient() = TestConnector().connect(clientTransport(server))
 
         val client1 = newClient()
 
diff --git a/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpTransportTest.kt b/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpTransportTest.kt
index d2410604..a55440e5 100644
--- a/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpTransportTest.kt
+++ b/rsocket-transports/ktor-tcp/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/tcp/TcpTransportTest.kt
@@ -21,8 +21,7 @@ import io.rsocket.kotlin.transport.tests.*
 
 class TcpTransportTest : TransportTest() {
     override suspend fun before() {
-        val address = InetSocketAddress("0.0.0.0", PortProvider.next())
-        startServer(TcpServerTransport(address)).serverSocket.await()
-        client = connectClient(TcpClientTransport(address, testContext))
+        val serverSocket = startServer(TcpServerTransport()).serverSocket.await()
+        client = connectClient(TcpClientTransport(serverSocket.localAddress as InetSocketAddress, testContext))
     }
 }
diff --git a/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/CIOWebSocketTransportTest.kt b/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/CIOWebSocketTransportTest.kt
index 08f5f81d..850b3cd0 100644
--- a/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/CIOWebSocketTransportTest.kt
+++ b/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/CIOWebSocketTransportTest.kt
@@ -16,31 +16,7 @@
 
 package io.rsocket.kotlin.transport.ktor.websocket.server
 
-import io.rsocket.kotlin.test.*
-import kotlin.test.*
-import kotlin.time.*
-import kotlin.time.Duration.Companion.minutes
 import io.ktor.client.engine.cio.CIO as ClientCIO
 import io.ktor.server.cio.CIO as ServerCIO
 
-class CIOWebSocketTransportTest : WebSocketTransportTest(ClientCIO, ServerCIO) {
-    //on native we need more time here
-    override val testTimeout: Duration = 5.minutes
-
-    //tests are ignored, because current CIO:native websockets implementation is unstable when working with large frames
-    @Test
-    @IgnoreNative
-    override fun largePayloadFireAndForget10() = super.largePayloadFireAndForget10()
-
-    @Test
-    @IgnoreNative
-    override fun largePayloadMetadataPush10() = super.largePayloadMetadataPush10()
-
-    @Test
-    @IgnoreNative
-    override fun largePayloadRequestChannel200() = super.largePayloadRequestChannel200()
-
-    @Test
-    @IgnoreNative
-    override fun largePayloadRequestResponse100() = super.largePayloadRequestResponse100()
-}
+class CIOWebSocketTransportTest : WebSocketTransportTest(ClientCIO, ServerCIO)
diff --git a/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketTransportTest.kt b/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketTransportTest.kt
index d47c9a7d..ffd26b12 100644
--- a/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketTransportTest.kt
+++ b/rsocket-transports/ktor-websocket-server/src/commonTest/kotlin/io/rsocket/kotlin/transport/ktor/websocket/server/WebSocketTransportTest.kt
@@ -26,12 +26,12 @@ abstract class WebSocketTransportTest(
     private val serverEngine: ApplicationEngineFactory<*, *>,
 ) : TransportTest() {
     override suspend fun before() {
-        val port = PortProvider.next()
-        startServer(
-            WebSocketServerTransport(serverEngine, port = port)
+        val engine = startServer(
+            WebSocketServerTransport(serverEngine, port = 0)
         )
+        val connector = engine.resolvedConnectors().single()
         client = connectClient(
-            WebSocketClientTransport(clientEngine, port = port, context = testContext)
+            WebSocketClientTransport(clientEngine, port = connector.port, context = testContext)
         )
     }
 }