diff --git a/internal/test/integration_test.go b/internal/test/integration_test.go
index 1e1fdd0..4f83fc0 100644
--- a/internal/test/integration_test.go
+++ b/internal/test/integration_test.go
@@ -185,7 +185,11 @@ func establishSession(lcc client.LocalConnConfig, rcc client.RemoteConnConfig, a
 	//									whatever connection initiator (including a proper ck-client)
 
 	netToCkServerD, ckServerListener := connutil.DialerListener(10 * 1024)
+	var sessionCreateMutex sync.Mutex
+
 	clientSeshMaker := func() *mux.Session {
+		sessionCreateMutex.Lock()
+		defer sessionCreateMutex.Unlock()
 		quad := make([]byte, 4)
 		common.RandRead(ai.WorldState.Rand, quad)
 		ai.SessionId = binary.BigEndian.Uint32(quad)