diff --git a/libraries/intentIqConstants/intentIqConstants.js b/libraries/intentIqConstants/intentIqConstants.js
index bfa8ae48d82..42760284524 100644
--- a/libraries/intentIqConstants/intentIqConstants.js
+++ b/libraries/intentIqConstants/intentIqConstants.js
@@ -8,7 +8,7 @@ export const DEFAULT_PERCENTAGE = 95;
 export const CLIENT_HINTS_KEY = "_iiq_ch";
 export const EMPTY = "EMPTY";
 export const GVLID = "1323";
-export const VERSION = 0.37;
+export const VERSION = 0.371;
 export const PREBID = "pbjs";
 export const HOURS_24 = 86400000;
 export const HOURS_72 = HOURS_24 * 3;
diff --git a/modules/intentIqIdSystem.js b/modules/intentIqIdSystem.js
index 7fa11b72656..dc1de9b8720 100644
--- a/modules/intentIqIdSystem.js
+++ b/modules/intentIqIdSystem.js
@@ -356,13 +356,18 @@ export const intentIqIdSubmodule = {
     const cmpData = getCmpData();
     const gdprDetected = cmpData.gdprString;
     firstPartyData = tryParse(readData(FIRST_PARTY_KEY_FINAL, allowedStorage));
-    actualABGroup = defineABTestingGroup(configParams, partnerData?.terminationCause);
-    if (groupChanged) groupChanged(actualABGroup, partnerData?.terminationCause);
     const currentBrowserLowerCase = detectBrowser();
     const browserBlackList = typeof configParams.browserBlackList === 'string' ? configParams.browserBlackList.toLowerCase() : '';
     const isBlacklisted = browserBlackList?.includes(currentBrowserLowerCase);
     let newUser = false;
 
+    if (!isBlacklisted) {
+      actualABGroup = defineABTestingGroup(configParams, partnerData?.terminationCause);
+      if (groupChanged) groupChanged(actualABGroup, partnerData?.terminationCause);
+    } else {
+      actualABGroup = undefined;
+    }
+
     setGamReporting(gamObjectReference, gamParameterName, actualABGroup, isBlacklisted);
 
     callbackTimeoutID = setTimeout(() => {
diff --git a/test/spec/modules/intentIqIdSystem_spec.js b/test/spec/modules/intentIqIdSystem_spec.js
index 279fd9cc5bb..e7a957b6dfc 100644
--- a/test/spec/modules/intentIqIdSystem_spec.js
+++ b/test/spec/modules/intentIqIdSystem_spec.js
@@ -2029,6 +2029,42 @@ describe('IntentIQ tests', function () {
     expect(groupChangedSpy.calledWith(usedGroup)).to.be.true;
   });
 
+  it('should NOT call groupChanged when the current browser is blacklisted', async function () {
+    const groupChangedSpy = sinon.spy();
+    const blk = detectBrowser();
+    const configParams = {
+      params: {
+        ...defaultConfigParams.params,
+        browserBlackList: blk,
+        groupChanged: groupChangedSpy
+      }
+    };
+
+    intentIqIdSubmodule.getId(configParams);
+    await waitForClientHints();
+
+    expect(groupChangedSpy.called).to.be.false;
+  });
+
+  it('should not mark a test group on the sync pixel when the current browser is blacklisted', async function () {
+    const blk = detectBrowser();
+    const configParams = {
+      params: {
+        ...defaultConfigParams.params,
+        browserBlackList: blk
+      }
+    };
+
+    intentIqIdSubmodule.getId(configParams);
+    await waitForClientHints();
+
+    const pixelRequest = server.requests[0];
+    expect(pixelRequest).to.exist;
+    expect(pixelRequest.url).to.include('at=20');
+    expect(pixelRequest.url).to.not.include('testGroup=');
+    expect(pixelRequest.url).to.include('isInTestGroup=false');
+  });
+
   it('should include testPercentage with configured abPercentage in AT=39 URL', async function () {
     const callBackSpy = sinon.spy();
     const configParams = {