diff --git a/internal/handshake/connection_parameters_manager.go b/internal/handshake/connection_parameters_manager.go
index a69f10bc..d2098922 100644
--- a/internal/handshake/connection_parameters_manager.go
+++ b/internal/handshake/connection_parameters_manager.go
@@ -66,9 +66,7 @@ var (
 func NewConnectionParamatersManager(
 	pers protocol.Perspective,
 	v protocol.VersionNumber,
-	maxReceiveStreamFlowControlWindow protocol.ByteCount,
-	maxReceiveConnectionFlowControlWindow protocol.ByteCount,
-	idleTimeout time.Duration,
+	params *TransportParameters,
 ) ConnectionParametersManager {
 	h := &connectionParametersManager{
 		perspective:                           pers,
@@ -77,11 +75,11 @@ func NewConnectionParamatersManager(
 		sendConnectionFlowControlWindow:       protocol.InitialConnectionFlowControlWindow, // can only be changed by the client
 		receiveStreamFlowControlWindow:        protocol.ReceiveStreamFlowControlWindow,
 		receiveConnectionFlowControlWindow:    protocol.ReceiveConnectionFlowControlWindow,
-		maxReceiveStreamFlowControlWindow:     maxReceiveStreamFlowControlWindow,
-		maxReceiveConnectionFlowControlWindow: maxReceiveConnectionFlowControlWindow,
+		maxReceiveStreamFlowControlWindow:     params.MaxReceiveStreamFlowControlWindow,
+		maxReceiveConnectionFlowControlWindow: params.MaxReceiveConnectionFlowControlWindow,
 	}
 
-	h.idleConnectionStateLifetime = idleTimeout
+	h.idleConnectionStateLifetime = params.IdleTimeout
 	if h.perspective == protocol.PerspectiveServer {
 		h.maxStreamsPerConnection = protocol.MaxStreamsPerConnection                // this is the value negotiated based on what the client sent
 		h.maxIncomingDynamicStreamsPerConnection = protocol.MaxStreamsPerConnection // "incoming" seen from the client's perspective
diff --git a/internal/handshake/connection_parameters_manager_test.go b/internal/handshake/connection_parameters_manager_test.go
index e5d02972..d7deec28 100644
--- a/internal/handshake/connection_parameters_manager_test.go
+++ b/internal/handshake/connection_parameters_manager_test.go
@@ -23,16 +23,20 @@ var _ = Describe("ConnectionsParameterManager", func() {
 		cpm = NewConnectionParamatersManager(
 			protocol.PerspectiveServer,
 			protocol.VersionWhatever,
-			maxReceiveStreamFlowControlWindowServer,
-			maxReceiveConnectionFlowControlWindowServer,
-			idleTimeout,
+			&TransportParameters{
+				MaxReceiveStreamFlowControlWindow:     maxReceiveStreamFlowControlWindowServer,
+				MaxReceiveConnectionFlowControlWindow: maxReceiveConnectionFlowControlWindowServer,
+				IdleTimeout:                           idleTimeout,
+			},
 		).(*connectionParametersManager)
 		cpmClient = NewConnectionParamatersManager(
 			protocol.PerspectiveClient,
 			protocol.VersionWhatever,
-			maxReceiveStreamFlowControlWindowClient,
-			maxReceiveConnectionFlowControlWindowClient,
-			idleTimeout,
+			&TransportParameters{
+				MaxReceiveStreamFlowControlWindow:     maxReceiveStreamFlowControlWindowClient,
+				MaxReceiveConnectionFlowControlWindow: maxReceiveConnectionFlowControlWindowClient,
+				IdleTimeout:                           idleTimeout,
+			},
 		).(*connectionParametersManager)
 	})
 
diff --git a/internal/handshake/crypto_setup_client.go b/internal/handshake/crypto_setup_client.go
index ecb404a4..d1274075 100644
--- a/internal/handshake/crypto_setup_client.go
+++ b/internal/handshake/crypto_setup_client.go
@@ -51,8 +51,8 @@ type cryptoSetupClient struct {
 	forwardSecureAEAD    crypto.AEAD
 	aeadChanged          chan<- protocol.EncryptionLevel
 
-	params               *TransportParameters
-	connectionParameters ConnectionParametersManager
+	requestConnIDTruncation bool
+	connectionParameters    ConnectionParametersManager
 }
 
 var _ CryptoSetup = &cryptoSetupClient{}
@@ -68,34 +68,34 @@ func NewCryptoSetupClient(
 	hostname string,
 	connID protocol.ConnectionID,
 	version protocol.VersionNumber,
-	cryptoStream io.ReadWriter,
 	tlsConfig *tls.Config,
-	connectionParameters ConnectionParametersManager,
-	aeadChanged chan<- protocol.EncryptionLevel,
 	params *TransportParameters,
+	aeadChanged chan<- protocol.EncryptionLevel,
 	negotiatedVersions []protocol.VersionNumber,
-) (CryptoSetup, error) {
+) (CryptoSetup, ConnectionParametersManager, error) {
+	cpm := NewConnectionParamatersManager(protocol.PerspectiveClient, version, params)
 	return &cryptoSetupClient{
-		hostname:             hostname,
-		connID:               connID,
-		version:              version,
-		cryptoStream:         cryptoStream,
-		certManager:          crypto.NewCertManager(tlsConfig),
-		connectionParameters: connectionParameters,
-		keyDerivation:        crypto.DeriveQuicCryptoAESKeys,
-		keyExchange:          getEphermalKEX,
-		nullAEAD:             crypto.NewNullAEAD(protocol.PerspectiveClient, version),
-		aeadChanged:          aeadChanged,
-		negotiatedVersions:   negotiatedVersions,
-		divNonceChan:         make(chan []byte),
-		params:               params,
-	}, nil
+		hostname:                hostname,
+		connID:                  connID,
+		version:                 version,
+		certManager:             crypto.NewCertManager(tlsConfig),
+		connectionParameters:    cpm,
+		requestConnIDTruncation: params.RequestConnectionIDTruncation,
+		keyDerivation:           crypto.DeriveQuicCryptoAESKeys,
+		keyExchange:             getEphermalKEX,
+		nullAEAD:                crypto.NewNullAEAD(protocol.PerspectiveClient, version),
+		aeadChanged:             aeadChanged,
+		negotiatedVersions:      negotiatedVersions,
+		divNonceChan:            make(chan []byte),
+	}, cpm, nil
 }
 
-func (h *cryptoSetupClient) HandleCryptoStream() error {
+func (h *cryptoSetupClient) HandleCryptoStream(stream io.ReadWriter) error {
 	messageChan := make(chan HandshakeMessage)
 	errorChan := make(chan error)
 
+	h.cryptoStream = stream
+
 	go func() {
 		for {
 			message, err := ParseHandshakeMessage(h.cryptoStream)
@@ -401,7 +401,6 @@ func (h *cryptoSetupClient) sendCHLO() error {
 	}
 
 	h.lastSentCHLO = b.Bytes()
-
 	return nil
 }
 
@@ -422,7 +421,7 @@ func (h *cryptoSetupClient) getTags() (map[Tag][]byte, error) {
 	binary.LittleEndian.PutUint32(versionTag, protocol.VersionNumberToTag(h.version))
 	tags[TagVER] = versionTag
 
-	if h.params.RequestConnectionIDTruncation {
+	if h.requestConnIDTruncation {
 		tags[TagTCID] = []byte{0, 0, 0, 0}
 	}
 	if len(h.stk) > 0 {
diff --git a/internal/handshake/crypto_setup_client_test.go b/internal/handshake/crypto_setup_client_test.go
index 181427bc..dc54b74f 100644
--- a/internal/handshake/crypto_setup_client_test.go
+++ b/internal/handshake/crypto_setup_client_test.go
@@ -109,20 +109,17 @@ var _ = Describe("Client Crypto Setup", func() {
 		certManager = &mockCertManager{}
 		version := protocol.Version37
 		aeadChanged = make(chan protocol.EncryptionLevel, 2)
-		csInt, err := NewCryptoSetupClient(
+		csInt, _, err := NewCryptoSetupClient(
 			"hostname",
 			0,
 			version,
-			stream,
 			nil,
-			NewConnectionParamatersManager(
-				protocol.PerspectiveClient,
-				version,
-				protocol.DefaultMaxReceiveStreamFlowControlWindowClient, protocol.DefaultMaxReceiveConnectionFlowControlWindowClient,
-				protocol.DefaultIdleTimeout,
-			),
+			&TransportParameters{
+				MaxReceiveStreamFlowControlWindow:     protocol.DefaultMaxReceiveStreamFlowControlWindowClient,
+				MaxReceiveConnectionFlowControlWindow: protocol.DefaultMaxReceiveConnectionFlowControlWindowClient,
+				IdleTimeout:                           protocol.DefaultIdleTimeout,
+			},
 			aeadChanged,
-			&TransportParameters{},
 			nil,
 		)
 		Expect(err).ToNot(HaveOccurred())
@@ -131,6 +128,7 @@ var _ = Describe("Client Crypto Setup", func() {
 		cs.keyDerivation = keyDerivation
 		cs.keyExchange = func() crypto.KeyExchange { return &mockKEX{ephermal: true} }
 		cs.nullAEAD = &mockAEAD{encLevel: protocol.EncryptionUnencrypted}
+		cs.cryptoStream = stream
 	})
 
 	AfterEach(func() {
@@ -146,13 +144,13 @@ var _ = Describe("Client Crypto Setup", func() {
 
 		It("rejects handshake messages with the wrong message tag", func() {
 			HandshakeMessage{Tag: TagCHLO, Data: tagMap}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.InvalidCryptoMessageType))
 		})
 
 		It("errors on invalid handshake messages", func() {
 			stream.dataToRead.Write([]byte("invalid message"))
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(HaveOccurred())
 			Expect(err.(*qerr.QuicError).ErrorCode).To(Equal(qerr.HandshakeFailed))
 		})
@@ -161,7 +159,7 @@ var _ = Describe("Client Crypto Setup", func() {
 			stk := []byte("foobar")
 			tagMap[TagSTK] = stk
 			HandshakeMessage{Tag: TagREJ, Data: tagMap}.Write(&stream.dataToRead)
-			go cs.HandleCryptoStream()
+			go cs.HandleCryptoStream(stream)
 			Eventually(func() []byte { return cs.stk }).Should(Equal(stk))
 		})
 
@@ -494,7 +492,7 @@ var _ = Describe("Client Crypto Setup", func() {
 		})
 
 		It("requests to truncate the connection ID", func() {
-			cs.params.RequestConnectionIDTruncation = true
+			cs.requestConnIDTruncation = true
 			tags, err := cs.getTags()
 			Expect(err).ToNot(HaveOccurred())
 			Expect(tags).To(HaveKeyWithValue(TagTCID, []byte{0, 0, 0, 0}))
@@ -663,7 +661,7 @@ var _ = Describe("Client Crypto Setup", func() {
 		It("tries to escalate before reading a handshake message", func() {
 			Expect(cs.secureAEAD).To(BeNil())
 			cs.serverVerified = true
-			go cs.HandleCryptoStream()
+			go cs.HandleCryptoStream(stream)
 			Eventually(aeadChanged).Should(Receive(Equal(protocol.EncryptionSecure)))
 			Expect(cs.secureAEAD).ToNot(BeNil())
 			Expect(aeadChanged).ToNot(Receive())
@@ -673,7 +671,7 @@ var _ = Describe("Client Crypto Setup", func() {
 		It("tries to escalate the crypto after receiving a diversification nonce", func(done Done) {
 			go func() {
 				defer GinkgoRecover()
-				cs.HandleCryptoStream()
+				cs.HandleCryptoStream(stream)
 				Fail("HandleCryptoStream should not have returned")
 			}()
 			cs.diversificationNonce = nil
@@ -836,14 +834,14 @@ var _ = Describe("Client Crypto Setup", func() {
 
 	Context("Diversification Nonces", func() {
 		It("sets a diversification nonce", func() {
-			go cs.HandleCryptoStream()
+			go cs.HandleCryptoStream(stream)
 			nonce := []byte("foobar")
 			cs.SetDiversificationNonce(nonce)
 			Eventually(func() []byte { return cs.diversificationNonce }).Should(Equal(nonce))
 		})
 
 		It("doesn't do anything when called multiple times with the same nonce", func(done Done) {
-			go cs.HandleCryptoStream()
+			go cs.HandleCryptoStream(stream)
 			nonce := []byte("foobar")
 			cs.SetDiversificationNonce(nonce)
 			cs.SetDiversificationNonce(nonce)
@@ -854,7 +852,7 @@ var _ = Describe("Client Crypto Setup", func() {
 		It("rejects a different diversification nonce", func() {
 			var err error
 			go func() {
-				err = cs.HandleCryptoStream()
+				err = cs.HandleCryptoStream(stream)
 			}()
 
 			nonce1 := []byte("foobar")
diff --git a/internal/handshake/crypto_setup_server.go b/internal/handshake/crypto_setup_server.go
index be55080c..b62e593c 100644
--- a/internal/handshake/crypto_setup_server.go
+++ b/internal/handshake/crypto_setup_server.go
@@ -69,17 +69,17 @@ func NewCryptoSetup(
 	remoteAddr net.Addr,
 	version protocol.VersionNumber,
 	scfg *ServerConfig,
-	cryptoStream io.ReadWriter,
-	connectionParametersManager ConnectionParametersManager,
+	params *TransportParameters,
 	supportedVersions []protocol.VersionNumber,
 	acceptSTK func(net.Addr, *Cookie) bool,
 	aeadChanged chan<- protocol.EncryptionLevel,
-) (CryptoSetup, error) {
+) (CryptoSetup, ConnectionParametersManager, error) {
 	stkGenerator, err := NewCookieGenerator()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
+	cpm := NewConnectionParamatersManager(protocol.PerspectiveServer, version, params)
 	return &cryptoSetupServer{
 		connID:               connID,
 		remoteAddr:           remoteAddr,
@@ -90,16 +90,17 @@ func NewCryptoSetup(
 		keyDerivation:        crypto.DeriveQuicCryptoAESKeys,
 		keyExchange:          getEphermalKEX,
 		nullAEAD:             crypto.NewNullAEAD(protocol.PerspectiveServer, version),
-		cryptoStream:         cryptoStream,
-		connectionParameters: connectionParametersManager,
+		connectionParameters: cpm,
 		acceptSTKCallback:    acceptSTK,
 		sentSHLO:             make(chan struct{}),
 		aeadChanged:          aeadChanged,
-	}, nil
+	}, cpm, nil
 }
 
 // HandleCryptoStream reads and writes messages on the crypto stream
-func (h *cryptoSetupServer) HandleCryptoStream() error {
+func (h *cryptoSetupServer) HandleCryptoStream(stream io.ReadWriter) error {
+	h.cryptoStream = stream
+
 	for {
 		var chloData bytes.Buffer
 		message, err := ParseHandshakeMessage(io.TeeReader(h.cryptoStream, &chloData))
diff --git a/internal/handshake/crypto_setup_server_test.go b/internal/handshake/crypto_setup_server_test.go
index c4f6a91b..cc900e5a 100644
--- a/internal/handshake/crypto_setup_server_test.go
+++ b/internal/handshake/crypto_setup_server_test.go
@@ -167,7 +167,6 @@ var _ = Describe("Server Crypto Setup", func() {
 		scfg              *ServerConfig
 		cs                *cryptoSetupServer
 		stream            *mockStream
-		cpm               ConnectionParametersManager
 		aeadChanged       chan protocol.EncryptionLevel
 		nonce32           []byte
 		versionTag        []byte
@@ -198,19 +197,16 @@ var _ = Describe("Server Crypto Setup", func() {
 		Expect(err).NotTo(HaveOccurred())
 		version = protocol.SupportedVersions[len(protocol.SupportedVersions)-1]
 		supportedVersions = []protocol.VersionNumber{version, 98, 99}
-		cpm = NewConnectionParamatersManager(
-			protocol.PerspectiveServer,
-			protocol.VersionWhatever,
-			protocol.DefaultMaxReceiveStreamFlowControlWindowServer, protocol.DefaultMaxReceiveConnectionFlowControlWindowServer,
-			protocol.DefaultIdleTimeout,
-		)
-		csInt, err := NewCryptoSetup(
+		csInt, _, err := NewCryptoSetup(
 			protocol.ConnectionID(42),
 			remoteAddr,
 			version,
 			scfg,
-			stream,
-			cpm,
+			&TransportParameters{
+				MaxReceiveStreamFlowControlWindow:     protocol.DefaultMaxReceiveStreamFlowControlWindowServer,
+				MaxReceiveConnectionFlowControlWindow: protocol.DefaultMaxReceiveConnectionFlowControlWindowServer,
+				IdleTimeout:                           protocol.DefaultIdleTimeout,
+			},
 			supportedVersions,
 			nil,
 			aeadChanged,
@@ -225,6 +221,7 @@ var _ = Describe("Server Crypto Setup", func() {
 		cs.keyDerivation = mockQuicCryptoKeyDerivation
 		cs.keyExchange = func() crypto.KeyExchange { return &mockKEX{ephermal: true} }
 		cs.nullAEAD = &mockAEAD{encLevel: protocol.EncryptionUnencrypted}
+		cs.cryptoStream = stream
 	})
 
 	AfterEach(func() {
@@ -277,7 +274,7 @@ var _ = Describe("Server Crypto Setup", func() {
 					TagFHL2: []byte("foobar"),
 				},
 			}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(ErrHOLExperiment))
 		})
 
@@ -288,7 +285,7 @@ var _ = Describe("Server Crypto Setup", func() {
 					TagNSTP: []byte("foobar"),
 				},
 			}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(ErrNSTPExperiment))
 		})
 
@@ -361,7 +358,7 @@ var _ = Describe("Server Crypto Setup", func() {
 				},
 			}.Write(&stream.dataToRead)
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(stream.dataWritten.Bytes()).To(HavePrefix("REJ"))
 			Expect(aeadChanged).To(Receive(Equal(protocol.EncryptionSecure)))
@@ -373,14 +370,14 @@ var _ = Describe("Server Crypto Setup", func() {
 		It("rejects client nonces that have the wrong length", func() {
 			fullCHLO[TagNONC] = []byte("too short client nonce")
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.InvalidCryptoMessageParameter, "invalid client nonce length")))
 		})
 
 		It("rejects client nonces that have the wrong OBIT value", func() {
 			fullCHLO[TagNONC] = make([]byte, 32) // the OBIT value is nonce[4:12] and here just initialized to 0
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.InvalidCryptoMessageParameter, "OBIT not matching")))
 		})
 
@@ -388,13 +385,13 @@ var _ = Describe("Server Crypto Setup", func() {
 			testErr := errors.New("test error")
 			kex.sharedKeyError = testErr
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(testErr))
 		})
 
 		It("handles 0-RTT handshake", func() {
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(stream.dataWritten.Bytes()).To(HavePrefix("SHLO"))
 			Expect(stream.dataWritten.Bytes()).ToNot(ContainSubstring("REJ"))
@@ -451,14 +448,14 @@ var _ = Describe("Server Crypto Setup", func() {
 					TagSNI:  []byte("quic.clemente.io"),
 				},
 			}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.InvalidCryptoMessageParameter, "client hello missing version tag")))
 		})
 
 		It("rejects CHLOs with a version tag that has the wrong length", func() {
 			fullCHLO[TagVER] = []byte{0x13, 0x37} // should be 4 bytes
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.InvalidCryptoMessageParameter, "incorrect version tag")))
 		})
 
@@ -471,7 +468,7 @@ var _ = Describe("Server Crypto Setup", func() {
 			binary.LittleEndian.PutUint32(b, protocol.VersionNumberToTag(lowestSupportedVersion))
 			fullCHLO[TagVER] = b
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.VersionNegotiationMismatch, "Downgrade attack detected")))
 		})
 
@@ -484,35 +481,35 @@ var _ = Describe("Server Crypto Setup", func() {
 			binary.LittleEndian.PutUint32(b, protocol.VersionNumberToTag(unsupportedVersion))
 			fullCHLO[TagVER] = b
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).ToNot(HaveOccurred())
 		})
 
 		It("errors if the AEAD tag is missing", func() {
 			delete(fullCHLO, TagAEAD)
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.CryptoNoSupport, "Unsupported AEAD or KEXS")))
 		})
 
 		It("errors if the AEAD tag has the wrong value", func() {
 			fullCHLO[TagAEAD] = []byte("wrong")
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.CryptoNoSupport, "Unsupported AEAD or KEXS")))
 		})
 
 		It("errors if the KEXS tag is missing", func() {
 			delete(fullCHLO, TagKEXS)
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.CryptoNoSupport, "Unsupported AEAD or KEXS")))
 		})
 
 		It("errors if the KEXS tag has the wrong value", func() {
 			fullCHLO[TagKEXS] = []byte("wrong")
 			HandshakeMessage{Tag: TagCHLO, Data: fullCHLO}.Write(&stream.dataToRead)
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(stream)
 			Expect(err).To(MatchError(qerr.Error(qerr.CryptoNoSupport, "Unsupported AEAD or KEXS")))
 		})
 	})
@@ -524,7 +521,7 @@ var _ = Describe("Server Crypto Setup", func() {
 				TagSTK: validSTK,
 			},
 		}.Write(&stream.dataToRead)
-		err := cs.HandleCryptoStream()
+		err := cs.HandleCryptoStream(stream)
 		Expect(err).To(MatchError("CryptoMessageParameterNotFound: SNI required"))
 	})
 
@@ -536,19 +533,19 @@ var _ = Describe("Server Crypto Setup", func() {
 				TagSNI: nil,
 			},
 		}.Write(&stream.dataToRead)
-		err := cs.HandleCryptoStream()
+		err := cs.HandleCryptoStream(stream)
 		Expect(err).To(MatchError("CryptoMessageParameterNotFound: SNI required"))
 	})
 
 	It("errors with invalid message", func() {
 		stream.dataToRead.Write([]byte("invalid message"))
-		err := cs.HandleCryptoStream()
+		err := cs.HandleCryptoStream(stream)
 		Expect(err).To(MatchError(qerr.HandshakeFailed))
 	})
 
 	It("errors with non-CHLO message", func() {
 		HandshakeMessage{Tag: TagPAD, Data: nil}.Write(&stream.dataToRead)
-		err := cs.HandleCryptoStream()
+		err := cs.HandleCryptoStream(stream)
 		Expect(err).To(MatchError(qerr.InvalidCryptoMessageType))
 	})
 
diff --git a/internal/handshake/crypto_setup_tls.go b/internal/handshake/crypto_setup_tls.go
index 1d940891..c306e67e 100644
--- a/internal/handshake/crypto_setup_tls.go
+++ b/internal/handshake/crypto_setup_tls.go
@@ -22,7 +22,6 @@ type cryptoSetupTLS struct {
 	keyDerivation KeyDerivationFunction
 
 	mintConf *mint.Config
-	conn     crypto.MintController
 
 	nullAEAD crypto.AEAD
 	aead     crypto.AEAD
@@ -30,43 +29,47 @@ type cryptoSetupTLS struct {
 	aeadChanged chan<- protocol.EncryptionLevel
 }
 
+var newMintController = func(conn *mint.Conn) crypto.MintController {
+	return &mintController{conn}
+}
+
 // NewCryptoSetupTLS creates a new CryptoSetup instance for a server
 func NewCryptoSetupTLS(
 	hostname string, // only needed for the client
 	perspective protocol.Perspective,
 	version protocol.VersionNumber,
 	tlsConfig *tls.Config,
-	cryptoStream io.ReadWriter,
 	aeadChanged chan<- protocol.EncryptionLevel,
-) (CryptoSetup, error) {
+) (CryptoSetup, ConnectionParametersManager, error) {
 	mintConf, err := tlsToMintConfig(tlsConfig, perspective)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	mintConf.ServerName = hostname
-	var conn *mint.Conn
-	if perspective == protocol.PerspectiveServer {
-		conn = mint.Server(&fakeConn{cryptoStream}, mintConf)
-	} else {
-		conn = mint.Client(&fakeConn{cryptoStream}, mintConf)
-	}
+
 	return &cryptoSetupTLS{
 		perspective:   perspective,
 		mintConf:      mintConf,
-		conn:          &mintController{conn},
 		nullAEAD:      crypto.NewNullAEAD(perspective, version),
 		keyDerivation: crypto.DeriveAESKeys,
 		aeadChanged:   aeadChanged,
-	}, nil
+	}, NewConnectionParamatersManager(perspective, version, &TransportParameters{IdleTimeout: protocol.DefaultIdleTimeout}), nil
 }
 
-func (h *cryptoSetupTLS) HandleCryptoStream() error {
-	alert := h.conn.Handshake()
-	if alert != mint.AlertNoAlert {
+func (h *cryptoSetupTLS) HandleCryptoStream(cryptoStream io.ReadWriter) error {
+	var conn *mint.Conn
+	if h.perspective == protocol.PerspectiveServer {
+		conn = mint.Server(&fakeConn{cryptoStream}, h.mintConf)
+	} else {
+		conn = mint.Client(&fakeConn{cryptoStream}, h.mintConf)
+	}
+	mc := newMintController(conn)
+
+	if alert := mc.Handshake(); alert != mint.AlertNoAlert {
 		return fmt.Errorf("TLS handshake error: %s (Alert %d)", alert.String(), alert)
 	}
 
-	aead, err := h.keyDerivation(h.conn, h.perspective)
+	aead, err := h.keyDerivation(mc, h.perspective)
 	if err != nil {
 		return err
 	}
diff --git a/internal/handshake/crypto_setup_tls_test.go b/internal/handshake/crypto_setup_tls_test.go
index 35a93f53..5cfb3e28 100644
--- a/internal/handshake/crypto_setup_tls_test.go
+++ b/internal/handshake/crypto_setup_tls_test.go
@@ -34,33 +34,42 @@ var _ = Describe("TLS Crypto Setup", func() {
 	var (
 		cs          *cryptoSetupTLS
 		aeadChanged chan protocol.EncryptionLevel
+
+		mintControllerConstructor = newMintController
 	)
 
 	BeforeEach(func() {
 		aeadChanged = make(chan protocol.EncryptionLevel, 2)
-		csInt, err := NewCryptoSetupTLS(
+		csInt, _, err := NewCryptoSetupTLS(
 			"",
 			protocol.PerspectiveServer,
 			protocol.VersionTLS,
 			testdata.GetTLSConfig(),
-			nil,
 			aeadChanged,
 		)
 		Expect(err).ToNot(HaveOccurred())
 		cs = csInt.(*cryptoSetupTLS)
 	})
 
+	AfterEach(func() {
+		newMintController = mintControllerConstructor
+	})
+
 	It("errors when the handshake fails", func() {
 		alert := mint.AlertBadRecordMAC
-		cs.conn = &fakeMintController{result: alert}
-		err := cs.HandleCryptoStream()
+		newMintController = func(*mint.Conn) crypto.MintController {
+			return &fakeMintController{result: alert}
+		}
+		err := cs.HandleCryptoStream(nil)
 		Expect(err).To(MatchError(fmt.Errorf("TLS handshake error: %s (Alert %d)", alert.String(), alert)))
 	})
 
 	It("derives keys", func() {
-		cs.conn = &fakeMintController{result: mint.AlertNoAlert}
+		newMintController = func(*mint.Conn) crypto.MintController {
+			return &fakeMintController{result: mint.AlertNoAlert}
+		}
 		cs.keyDerivation = mockKeyDerivation
-		err := cs.HandleCryptoStream()
+		err := cs.HandleCryptoStream(nil)
 		Expect(err).ToNot(HaveOccurred())
 		Expect(aeadChanged).To(Receive(Equal(protocol.EncryptionForwardSecure)))
 		Expect(aeadChanged).To(BeClosed())
@@ -70,9 +79,11 @@ var _ = Describe("TLS Crypto Setup", func() {
 		var foobarFNVSigned []byte // a "foobar", FNV signed
 
 		doHandshake := func() {
-			cs.conn = &fakeMintController{result: mint.AlertNoAlert}
+			newMintController = func(*mint.Conn) crypto.MintController {
+				return &fakeMintController{result: mint.AlertNoAlert}
+			}
 			cs.keyDerivation = mockKeyDerivation
-			err := cs.HandleCryptoStream()
+			err := cs.HandleCryptoStream(nil)
 			Expect(err).ToNot(HaveOccurred())
 		}
 
diff --git a/internal/handshake/interface.go b/internal/handshake/interface.go
index f797cb4e..0f9e5cf6 100644
--- a/internal/handshake/interface.go
+++ b/internal/handshake/interface.go
@@ -1,6 +1,11 @@
 package handshake
 
-import "github.com/lucas-clemente/quic-go/internal/protocol"
+import (
+	"io"
+	"time"
+
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+)
 
 // Sealer seals a packet
 type Sealer interface {
@@ -11,7 +16,7 @@ type Sealer interface {
 // CryptoSetup is a crypto setup
 type CryptoSetup interface {
 	Open(dst, src []byte, packetNumber protocol.PacketNumber, associatedData []byte) ([]byte, protocol.EncryptionLevel, error)
-	HandleCryptoStream() error
+	HandleCryptoStream(io.ReadWriter) error
 	// TODO: clean up this interface
 	DiversificationNonce() []byte   // only needed for cryptoSetupServer
 	SetDiversificationNonce([]byte) // only needed for cryptoSetupClient
@@ -23,5 +28,8 @@ type CryptoSetup interface {
 
 // TransportParameters are parameters sent to the peer during the handshake
 type TransportParameters struct {
-	RequestConnectionIDTruncation bool
+	RequestConnectionIDTruncation         bool
+	MaxReceiveStreamFlowControlWindow     protocol.ByteCount
+	MaxReceiveConnectionFlowControlWindow protocol.ByteCount
+	IdleTimeout                           time.Duration
 }
diff --git a/packet_packer_test.go b/packet_packer_test.go
index 9f7c2a9a..aafa4549 100644
--- a/packet_packer_test.go
+++ b/packet_packer_test.go
@@ -2,6 +2,7 @@ package quic
 
 import (
 	"bytes"
+	"io"
 	"math"
 
 	"github.com/lucas-clemente/quic-go/ackhandler"
@@ -32,7 +33,7 @@ type mockCryptoSetup struct {
 
 var _ handshake.CryptoSetup = &mockCryptoSetup{}
 
-func (m *mockCryptoSetup) HandleCryptoStream() error {
+func (m *mockCryptoSetup) HandleCryptoStream(io.ReadWriter) error {
 	return m.handleErr
 }
 func (m *mockCryptoSetup) Open(dst, src []byte, packetNumber protocol.PacketNumber, associatedData []byte) ([]byte, protocol.EncryptionLevel, error) {
diff --git a/session.go b/session.go
index 8a5e9c9a..d1f8d35f 100644
--- a/session.go
+++ b/session.go
@@ -180,69 +180,57 @@ func (s *session) setup(
 	s.sessionCreationTime = now
 
 	s.rttStats = &congestion.RTTStats{}
-	s.connectionParameters = handshake.NewConnectionParamatersManager(
-		s.perspective,
-		s.version,
-		protocol.ByteCount(s.config.MaxReceiveStreamFlowControlWindow),
-		protocol.ByteCount(s.config.MaxReceiveConnectionFlowControlWindow),
-		s.config.IdleTimeout,
-	)
+	transportParams := &handshake.TransportParameters{
+		MaxReceiveStreamFlowControlWindow:     protocol.ByteCount(s.config.MaxReceiveStreamFlowControlWindow),
+		MaxReceiveConnectionFlowControlWindow: protocol.ByteCount(s.config.MaxReceiveConnectionFlowControlWindow),
+		IdleTimeout:                           s.config.IdleTimeout,
+	}
 	s.sentPacketHandler = ackhandler.NewSentPacketHandler(s.rttStats)
-	s.flowControlManager = flowcontrol.NewFlowControlManager(s.connectionParameters, s.rttStats)
 	s.receivedPacketHandler = ackhandler.NewReceivedPacketHandler(s.version)
-	s.streamsMap = newStreamsMap(s.newStream, s.perspective, s.connectionParameters)
-	s.streamFramer = newStreamFramer(s.streamsMap, s.flowControlManager)
 
 	var err error
 	if s.perspective == protocol.PerspectiveServer {
-		cryptoStream, _ := s.GetOrOpenStream(1)
-		_, _ = s.AcceptStream() // don't expose the crypto stream
 		verifySourceAddr := func(clientAddr net.Addr, cookie *Cookie) bool {
 			return s.config.AcceptCookie(clientAddr, cookie)
 		}
 		if s.version.UsesTLS() {
-			s.cryptoSetup, err = handshake.NewCryptoSetupTLS(
+			s.cryptoSetup, s.connectionParameters, err = handshake.NewCryptoSetupTLS(
 				"",
 				s.perspective,
 				s.version,
 				tlsConf,
-				cryptoStream,
 				aeadChanged,
 			)
 		} else {
-			s.cryptoSetup, err = newCryptoSetup(
+			s.cryptoSetup, s.connectionParameters, err = newCryptoSetup(
 				s.connectionID,
 				s.conn.RemoteAddr(),
 				s.version,
 				scfg,
-				cryptoStream,
-				s.connectionParameters,
+				transportParams,
 				s.config.Versions,
 				verifySourceAddr,
 				aeadChanged,
 			)
 		}
 	} else {
-		cryptoStream, _ := s.OpenStream()
 		if s.version.UsesTLS() {
-			s.cryptoSetup, err = handshake.NewCryptoSetupTLS(
+			s.cryptoSetup, s.connectionParameters, err = handshake.NewCryptoSetupTLS(
 				hostname,
 				s.perspective,
 				s.version,
 				tlsConf,
-				cryptoStream,
 				aeadChanged,
 			)
 		} else {
-			s.cryptoSetup, err = newCryptoSetupClient(
+			transportParams.RequestConnectionIDTruncation = s.config.RequestConnectionIDTruncation
+			s.cryptoSetup, s.connectionParameters, err = newCryptoSetupClient(
 				hostname,
 				s.connectionID,
 				s.version,
-				cryptoStream,
 				tlsConf,
-				s.connectionParameters,
+				transportParams,
 				aeadChanged,
-				&handshake.TransportParameters{RequestConnectionIDTruncation: s.config.RequestConnectionIDTruncation},
 				negotiatedVersions,
 			)
 		}
@@ -251,6 +239,9 @@ func (s *session) setup(
 		return nil, nil, err
 	}
 
+	s.flowControlManager = flowcontrol.NewFlowControlManager(s.connectionParameters, s.rttStats)
+	s.streamsMap = newStreamsMap(s.newStream, s.perspective, s.connectionParameters)
+	s.streamFramer = newStreamFramer(s.streamsMap, s.flowControlManager)
 	s.packer = newPacketPacker(s.connectionID,
 		s.cryptoSetup,
 		s.connectionParameters,
@@ -266,8 +257,16 @@ func (s *session) setup(
 // run the session main loop
 func (s *session) run() error {
 	// Start the crypto stream handler
+	var cryptoStream Stream
+	if s.perspective == protocol.PerspectiveServer {
+		cryptoStream, _ = s.GetOrOpenStream(1)
+		_, _ = s.AcceptStream() // don't expose the crypto stream
+	} else {
+		cryptoStream, _ = s.OpenStream()
+	}
+
 	go func() {
-		if err := s.cryptoSetup.HandleCryptoStream(); err != nil {
+		if err := s.cryptoSetup.HandleCryptoStream(cryptoStream); err != nil {
 			s.Close(err)
 		}
 	}()
diff --git a/session_test.go b/session_test.go
index 5eb3921e..05ceb3a1 100644
--- a/session_test.go
+++ b/session_test.go
@@ -143,12 +143,48 @@ func areSessionsRunning() bool {
 	return strings.Contains(b.String(), "quic-go.(*session).run")
 }
 
+type mockConnectionParametersManager struct {
+}
+
+func (m *mockConnectionParametersManager) SetFromMap(map[handshake.Tag][]byte) error {
+	panic("not implement")
+}
+func (m *mockConnectionParametersManager) GetHelloMap() (map[handshake.Tag][]byte, error) {
+	panic("not implement")
+}
+
+func (m *mockConnectionParametersManager) GetSendStreamFlowControlWindow() protocol.ByteCount {
+	return protocol.InitialStreamFlowControlWindow
+}
+func (m *mockConnectionParametersManager) GetSendConnectionFlowControlWindow() protocol.ByteCount {
+	return protocol.InitialConnectionFlowControlWindow
+}
+func (m *mockConnectionParametersManager) GetReceiveStreamFlowControlWindow() protocol.ByteCount {
+	return protocol.ReceiveStreamFlowControlWindow
+}
+func (m *mockConnectionParametersManager) GetMaxReceiveStreamFlowControlWindow() protocol.ByteCount {
+	return protocol.DefaultMaxReceiveStreamFlowControlWindowServer
+}
+func (m *mockConnectionParametersManager) GetReceiveConnectionFlowControlWindow() protocol.ByteCount {
+	return protocol.ReceiveConnectionFlowControlWindow
+}
+func (m *mockConnectionParametersManager) GetMaxReceiveConnectionFlowControlWindow() protocol.ByteCount {
+	return protocol.DefaultMaxReceiveConnectionFlowControlWindowServer
+}
+func (m *mockConnectionParametersManager) GetMaxOutgoingStreams() uint32 { return 100 }
+func (m *mockConnectionParametersManager) GetMaxIncomingStreams() uint32 { return 100 }
+func (m *mockConnectionParametersManager) GetIdleConnectionStateLifetime() time.Duration {
+	return time.Hour
+}
+func (m *mockConnectionParametersManager) TruncateConnectionID() bool { return false }
+
+var _ handshake.ConnectionParametersManager = &mockConnectionParametersManager{}
+
 var _ = Describe("Session", func() {
 	var (
 		sess          *session
 		scfg          *handshake.ServerConfig
 		mconn         *mockConnection
-		mockCpm       *mocks.MockConnectionParametersManager
 		cryptoSetup   *mockCryptoSetup
 		handshakeChan <-chan handshakeEvent
 		aeadChanged   chan<- protocol.EncryptionLevel
@@ -163,14 +199,13 @@ var _ = Describe("Session", func() {
 			_ net.Addr,
 			_ protocol.VersionNumber,
 			_ *handshake.ServerConfig,
-			_ io.ReadWriter,
-			_ handshake.ConnectionParametersManager,
+			_ *handshake.TransportParameters,
 			_ []protocol.VersionNumber,
 			_ func(net.Addr, *Cookie) bool,
 			aeadChangedP chan<- protocol.EncryptionLevel,
-		) (handshake.CryptoSetup, error) {
+		) (handshake.CryptoSetup, handshake.ConnectionParametersManager, error) {
 			aeadChanged = aeadChangedP
-			return cryptoSetup, nil
+			return cryptoSetup, &mockConnectionParametersManager{}, nil
 		}
 
 		mconn = newMockConnection()
@@ -190,11 +225,9 @@ var _ = Describe("Session", func() {
 		)
 		Expect(err).NotTo(HaveOccurred())
 		sess = pSess.(*session)
-		Expect(sess.streamsMap.openStreams).To(HaveLen(1)) // Crypto stream
+		Expect(sess.streamsMap.openStreams).To(BeEmpty()) // the crypto stream is opened in session.run()
 
-		mockCpm = mocks.NewMockConnectionParametersManager(mockCtrl)
-		mockCpm.EXPECT().GetIdleConnectionStateLifetime().Return(time.Minute).AnyTimes()
-		sess.connectionParameters = mockCpm
+		sess.connectionParameters = &mockConnectionParametersManager{}
 	})
 
 	AfterEach(func() {
@@ -216,14 +249,13 @@ var _ = Describe("Session", func() {
 				_ net.Addr,
 				_ protocol.VersionNumber,
 				_ *handshake.ServerConfig,
-				_ io.ReadWriter,
-				_ handshake.ConnectionParametersManager,
+				_ *handshake.TransportParameters,
 				_ []protocol.VersionNumber,
 				cookieFunc func(net.Addr, *Cookie) bool,
 				_ chan<- protocol.EncryptionLevel,
-			) (handshake.CryptoSetup, error) {
+			) (handshake.CryptoSetup, handshake.ConnectionParametersManager, error) {
 				cookieVerify = cookieFunc
-				return cryptoSetup, nil
+				return cryptoSetup, &mockConnectionParametersManager{}, nil
 			}
 
 			conf := populateServerConfig(&Config{})
@@ -730,18 +762,23 @@ var _ = Describe("Session", func() {
 
 	Context("accepting streams", func() {
 		It("waits for new streams", func() {
-			var str Stream
+			strChan := make(chan Stream)
 			go func() {
 				defer GinkgoRecover()
-				var err error
-				str, err = sess.AcceptStream()
-				Expect(err).ToNot(HaveOccurred())
+				for {
+					str, err := sess.AcceptStream()
+					Expect(err).ToNot(HaveOccurred())
+					strChan <- str
+				}
 			}()
-			Consistently(func() Stream { return str }).Should(BeNil())
+			Consistently(strChan).ShouldNot(Receive())
 			sess.handleStreamFrame(&wire.StreamFrame{
 				StreamID: 3,
 			})
-			Eventually(func() Stream { return str }).ShouldNot(BeNil())
+			var str Stream
+			Eventually(strChan).Should(Receive(&str))
+			Expect(str.StreamID()).To(Equal(protocol.StreamID(1)))
+			Eventually(strChan).Should(Receive(&str))
 			Expect(str.StreamID()).To(Equal(protocol.StreamID(3)))
 		})
 
@@ -944,7 +981,7 @@ var _ = Describe("Session", func() {
 	})
 
 	Context("sending packets", func() {
-		It("sends ack frames", func() {
+		It("sends ACK frames", func() {
 			packetNumber := protocol.PacketNumber(0x035E)
 			sess.receivedPacketHandler.ReceivedPacket(packetNumber, true)
 			err := sess.sendPacket()
@@ -1528,7 +1565,7 @@ var _ = Describe("Session", func() {
 		It("does not use ICSL before handshake", func() {
 			defer sess.Close(nil)
 			sess.lastNetworkActivityTime = time.Now().Add(-time.Minute)
-			mockCpm = mocks.NewMockConnectionParametersManager(mockCtrl)
+			mockCpm := mocks.NewMockConnectionParametersManager(mockCtrl)
 			mockCpm.EXPECT().GetIdleConnectionStateLifetime().Return(9999 * time.Second).AnyTimes()
 			mockCpm.EXPECT().TruncateConnectionID().Return(false).AnyTimes()
 			sess.connectionParameters = mockCpm
@@ -1545,7 +1582,7 @@ var _ = Describe("Session", func() {
 
 		It("uses ICSL after handshake", func(done Done) {
 			close(aeadChanged)
-			mockCpm = mocks.NewMockConnectionParametersManager(mockCtrl)
+			mockCpm := mocks.NewMockConnectionParametersManager(mockCtrl)
 			mockCpm.EXPECT().GetIdleConnectionStateLifetime().Return(0 * time.Second)
 			mockCpm.EXPECT().TruncateConnectionID().Return(false).AnyTimes()
 			sess.connectionParameters = mockCpm
@@ -1599,7 +1636,9 @@ var _ = Describe("Session", func() {
 
 	Context("counting streams", func() {
 		It("errors when too many streams are opened", func() {
-			for i := 0; i < 110; i++ {
+			mockCpm := mocks.NewMockConnectionParametersManager(mockCtrl)
+			mockCpm.EXPECT().GetMaxIncomingStreams().Return(uint32(10)).AnyTimes()
+			for i := 0; i < 10; i++ {
 				_, err := sess.GetOrOpenStream(protocol.StreamID(i*2 + 1))
 				Expect(err).NotTo(HaveOccurred())
 			}
@@ -1608,6 +1647,8 @@ var _ = Describe("Session", func() {
 		})
 
 		It("does not error when many streams are opened and closed", func() {
+			mockCpm := mocks.NewMockConnectionParametersManager(mockCtrl)
+			mockCpm.EXPECT().GetMaxIncomingStreams().Return(uint32(10)).AnyTimes()
 			for i := 2; i <= 1000; i++ {
 				s, err := sess.GetOrOpenStream(protocol.StreamID(i*2 + 1))
 				Expect(err).NotTo(HaveOccurred())
@@ -1641,11 +1682,13 @@ var _ = Describe("Session", func() {
 
 	Context("window updates", func() {
 		It("gets stream level window updates", func() {
-			err := sess.flowControlManager.AddBytesRead(1, protocol.ReceiveStreamFlowControlWindow)
+			_, err := sess.GetOrOpenStream(3)
+			Expect(err).ToNot(HaveOccurred())
+			err = sess.flowControlManager.AddBytesRead(3, protocol.ReceiveStreamFlowControlWindow)
 			Expect(err).NotTo(HaveOccurred())
 			frames := sess.getWindowUpdateFrames()
 			Expect(frames).To(HaveLen(1))
-			Expect(frames[0].StreamID).To(Equal(protocol.StreamID(1)))
+			Expect(frames[0].StreamID).To(Equal(protocol.StreamID(3)))
 			Expect(frames[0].ByteOffset).To(BeEquivalentTo(protocol.ReceiveStreamFlowControlWindow * 2))
 		})
 
@@ -1691,15 +1734,13 @@ var _ = Describe("Client Session", func() {
 			_ string,
 			_ protocol.ConnectionID,
 			_ protocol.VersionNumber,
-			_ io.ReadWriter,
 			_ *tls.Config,
-			_ handshake.ConnectionParametersManager,
-			aeadChangedP chan<- protocol.EncryptionLevel,
 			_ *handshake.TransportParameters,
+			aeadChangedP chan<- protocol.EncryptionLevel,
 			_ []protocol.VersionNumber,
-		) (handshake.CryptoSetup, error) {
+		) (handshake.CryptoSetup, handshake.ConnectionParametersManager, error) {
 			aeadChanged = aeadChangedP
-			return cryptoSetup, nil
+			return cryptoSetup, &mockConnectionParametersManager{}, nil
 		}
 
 		mconn = newMockConnection()
@@ -1714,7 +1755,7 @@ var _ = Describe("Client Session", func() {
 		)
 		sess = sessP.(*session)
 		Expect(err).ToNot(HaveOccurred())
-		Expect(sess.streamsMap.openStreams).To(HaveLen(1)) // Crypto stream
+		Expect(sess.streamsMap.openStreams).To(BeEmpty()) // the crypto stream is opened in session.run()
 	})
 
 	AfterEach(func() {