diff --git a/src/connection/connection.js b/src/connection/connection.js
index d1ff248..3fb7291 100644
--- a/src/connection/connection.js
+++ b/src/connection/connection.js
@@ -2,10 +2,11 @@
 
 const PeerId = require('peer-id')
 const multiaddr = require('multiaddr')
-const withIs = require('class-is')
 const errCode = require('err-code')
 const Status = require('./status')
 
+const connectionSymbol = Symbol.for('@libp2p/interface-connection/connection')
+
 function validateArgs (localAddr, localPeer, remotePeer, newStream, close, getStreams, stat) {
   if (localAddr && !multiaddr.isMultiaddr(localAddr)) {
     throw errCode(new Error('localAddr must be an instance of multiaddr'), 'ERR_INVALID_PARAMETERS')
@@ -138,6 +139,24 @@ class Connection {
     this.tags = []
   }
 
+  get [Symbol.toStringTag] () {
+    return 'Connection'
+  }
+
+  get [connectionSymbol]() {
+    return true
+  }
+
+  /**
+   * Checks if the given value is a `Connection` instance.
+   *
+   * @param {any} other
+   * @returns {other is Connection}
+   */
+  static isConnection(other) {
+    return Boolean(other && other[connectionSymbol])
+  }
+
   /**
    * Get connection metadata
    * @this {Connection}
@@ -227,8 +246,5 @@ class Connection {
   }
 }
 
-/**
- * @module
- * @type {typeof Connection}
- */
-module.exports = withIs(Connection, { className: 'Connection', symbolName: '@libp2p/interface-connection/connection' })
+
+module.exports = Connection
diff --git a/src/topology/index.js b/src/topology/index.js
index 77af929..30c6996 100644
--- a/src/topology/index.js
+++ b/src/topology/index.js
@@ -1,13 +1,13 @@
 'use strict'
 
-const withIs = require('class-is')
 const noop = () => {}
+const topologySymbol = Symbol.for('@libp2p/js-interfaces/topology')
 
 class Topology {
   /**
    * @param {Object} props
-   * @param {number} props.min minimum needed connections (default: 0)
-   * @param {number} props.max maximum needed connections (default: Infinity)
+   * @param {number} [props.min] minimum needed connections (default: 0)
+   * @param {number} [props.max] maximum needed connections (default: Infinity)
    * @param {Object} [props.handlers]
    * @param {function} [props.handlers.onConnect] protocol "onConnect" handler
    * @param {function} [props.handlers.onDisconnect] protocol "onDisconnect" handler
@@ -32,6 +32,24 @@ class Topology {
     this.peers = new Set()
   }
 
+  get [Symbol.toStringTag] () {
+      return 'Topology'
+  }
+
+  get [topologySymbol]() {
+    return true
+  }
+
+  /**
+   * Checks if the given value is a Topology instance.
+   *
+   * @param {any} other
+   * @returns {other is Topology}
+   */
+  static isTopology(other) {
+    return Boolean(other && other[topologySymbol])
+  }
+
   set registrar (registrar) {
     this._registrar = registrar
   }
@@ -51,8 +69,4 @@ class Topology {
   }
 }
 
-/**
- * @module
- * @type {Topology}
- */
-module.exports = withIs(Topology, { className: 'Topology', symbolName: '@libp2p/js-interfaces/topology' })
+module.exports = Topology
diff --git a/src/topology/multicodec-topology.js b/src/topology/multicodec-topology.js
index 2cdc076..52ddef4 100644
--- a/src/topology/multicodec-topology.js
+++ b/src/topology/multicodec-topology.js
@@ -1,14 +1,14 @@
 'use strict'
 
-const withIs = require('class-is')
-
 const Topology = require('./index')
+const multicodecTopologySymbol = Symbol.for('@libp2p/js-interfaces/topology/multicodec-topology')
+
 
 class MulticodecTopology extends Topology {
   /**
    * @param {Object} props
-   * @param {number} props.min minimum needed connections (default: 0)
-   * @param {number} props.max maximum needed connections (default: Infinity)
+   * @param {number} [props.min] minimum needed connections (default: 0)
+   * @param {number} [props.max] maximum needed connections (default: Infinity)
    * @param {Array<string>} props.multicodecs protocol multicodecs
    * @param {Object} props.handlers
    * @param {function} props.handlers.onConnect protocol "onConnect" handler
@@ -46,6 +46,24 @@ class MulticodecTopology extends Topology {
     this._onPeerConnect = this._onPeerConnect.bind(this)
   }
 
+  get [Symbol.toStringTag] () {
+    return 'Topology'
+  }
+
+  get [multicodecTopologySymbol]() {
+    return true
+  }
+
+  /**
+   * Checks if the given value is a `MulticodecTopology` instance.
+   *
+   * @param {any} other
+   * @returns {other is MulticodecTopology}
+   */
+  static isMulticodecTopology(other) {
+    return Boolean(other && other[multicodecTopologySymbol])
+  }
+
   set registrar (registrar) {
     this._registrar = registrar
     this._registrar.peerStore.on('change:protocols', this._onProtocolChange)
@@ -120,8 +138,4 @@ class MulticodecTopology extends Topology {
   }
 }
 
-/**
- * @module
- * @type {MulticodecTopology}
- */
-module.exports = withIs(MulticodecTopology, { className: 'MulticodecTopology', symbolName: '@libp2p/js-interfaces/topology/multicodec-topology' })
+module.exports = MulticodecTopology