diff --git a/packages/@webex/internal-plugin-mercury/src/mercury.js b/packages/@webex/internal-plugin-mercury/src/mercury.js
index 25d0a7bbc69..5c94ebc4265 100644
--- a/packages/@webex/internal-plugin-mercury/src/mercury.js
+++ b/packages/@webex/internal-plugin-mercury/src/mercury.js
@@ -185,6 +185,8 @@ const Mercury = WebexPlugin.extend({
           webSocketUrl.query.multipleConnections = true;
         }
 
+        webSocketUrl.query.clientTimestamp = Date.now();
+
         return url.format(webSocketUrl);
       });
   },
diff --git a/packages/@webex/internal-plugin-mercury/test/unit/spec/mercury.js b/packages/@webex/internal-plugin-mercury/test/unit/spec/mercury.js
index 275cc9c8494..cd65a870e0c 100644
--- a/packages/@webex/internal-plugin-mercury/test/unit/spec/mercury.js
+++ b/packages/@webex/internal-plugin-mercury/test/unit/spec/mercury.js
@@ -447,7 +447,7 @@ describe('plugin-mercury', () => {
             assert.isFalse(mercury.connecting, 'Mercury is not connecting');
             assert.calledWith(
               Socket.prototype.open,
-              sinon.match(/ws:\/\/providedurl.com/),
+              sinon.match(/ws:\/\/providedurl.com.*clientTimestamp[=]\d+/),
               sinon.match.any
             );
           });
@@ -783,16 +783,16 @@ describe('plugin-mercury', () => {
       it('uses provided webSocketUrl', () =>
         webex.internal.mercury
           ._prepareUrl('ws://provided.com')
-          .then((wsUrl) => assert.match(wsUrl, /provided.com/)));
+          .then((wsUrl) => assert.match(wsUrl, /.*provided.com.*/)));
       it('requests text-mode WebSockets', () =>
         webex.internal.mercury
           ._prepareUrl()
-          .then((wsUrl) => assert.match(wsUrl, /outboundWireFormat=text/)));
+          .then((wsUrl) => assert.match(wsUrl, /.*outboundWireFormat=text.*/)));
 
       it('requests the buffer state message', () =>
         webex.internal.mercury
           ._prepareUrl()
-          .then((wsUrl) => assert.match(wsUrl, /bufferStates=true/)));
+          .then((wsUrl) => assert.match(wsUrl, /.*bufferStates=true.*/)));
 
       it('does not add conditional properties', () =>
         webex.internal.mercury._prepareUrl().then((wsUrl) => {