diff --git a/modules/pubmaticBidAdapter.js b/modules/pubmaticBidAdapter.js
index 358fd7bcf3a..cf4ccee17d0 100644
--- a/modules/pubmaticBidAdapter.js
+++ b/modules/pubmaticBidAdapter.js
@@ -895,6 +895,11 @@ export const spec = {
     payload.site.page = conf.kadpageurl.trim() || payload.site.page.trim();
     payload.site.domain = _getDomainFromURL(payload.site.page);
 
+    // test bids
+    if (window.location.href.indexOf('pubmaticTest=true') !== -1) {
+      payload.test = 1;
+    }
+
     // adding schain object
     if (validBidRequests[0].schain) {
       payload.source = {
diff --git a/modules/pubmaticBidAdapter.md b/modules/pubmaticBidAdapter.md
index 1948acba40f..fc7766430a2 100644
--- a/modules/pubmaticBidAdapter.md
+++ b/modules/pubmaticBidAdapter.md
@@ -199,4 +199,7 @@ pbjs.setConfig({
 });
 
 ```
-Note: Combine the above the configuration with any other UserSync configuration.  Multiple setConfig() calls overwrite each other and only last call for a given attribute will take effect.
+Note: Combine the above the configuration with any other UserSync configuration.  Multiple setConfig() calls overwrite each other and only last call for a given attribute will take effect. 
+
+Note: PubMatic will return a test-bid if "pubmaticTest=true" is present in page URL
+
diff --git a/test/spec/modules/pubmaticBidAdapter_spec.js b/test/spec/modules/pubmaticBidAdapter_spec.js
index f0c97cd72f3..85d135d9f79 100644
--- a/test/spec/modules/pubmaticBidAdapter_spec.js
+++ b/test/spec/modules/pubmaticBidAdapter_spec.js
@@ -719,9 +719,23 @@ describe('PubMatic adapter', function () {
         expect(request.method).to.equal('POST');
   		});
 
+      it('test flag not sent when pubmaticTest=true is absent in page url', function() {
+        let request = spec.buildRequests(bidRequests);
+        let data = JSON.parse(request.data);
+        expect(data.test).to.equal(undefined);
+      });
+
+      it('test flag set to 1 when pubmaticTest=true is present in page url', function() {
+        window.location.href += '#pubmaticTest=true';
+        // now all the test cases below will have window.location.href with #pubmaticTest=true
+        let request = spec.buildRequests(bidRequests);
+        let data = JSON.parse(request.data);
+        expect(data.test).to.equal(1);
+      });
+
   		it('Request params check', function () {
-  		  let request = spec.buildRequests(bidRequests);
-  		  let data = JSON.parse(request.data);
+        let request = spec.buildRequests(bidRequests);
+        let data = JSON.parse(request.data);
   		  expect(data.at).to.equal(1); // auction type
   		  expect(data.cur[0]).to.equal('USD'); // currency
   		  expect(data.site.domain).to.be.a('string'); // domain should be set