diff --git a/src/main/java/org/prebid/server/bidder/onetag/OnetagBidder.java b/src/main/java/org/prebid/server/bidder/onetag/OnetagBidder.java
index c7fa5589fb2..ec6c9718ea5 100644
--- a/src/main/java/org/prebid/server/bidder/onetag/OnetagBidder.java
+++ b/src/main/java/org/prebid/server/bidder/onetag/OnetagBidder.java
@@ -22,7 +22,6 @@
 import org.prebid.server.util.BidderUtil;
 import org.prebid.server.util.HttpUtil;
 
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
@@ -45,20 +44,18 @@ public OnetagBidder(String endpointUrl, JacksonMapper mapper) {
 
     @Override
     public Result<List<HttpRequest<BidRequest>>> makeHttpRequests(BidRequest request) {
-        final List<Imp> modifiedImps = new ArrayList<>();
         String requestPubId = null;
         for (Imp imp : request.getImp()) {
             try {
                 final ExtImpOnetag impExt = parseImpExt(imp);
                 requestPubId = resolveAndValidatePubId(impExt.getPubId(), requestPubId);
-
-                modifiedImps.add(imp.toBuilder().ext(impExt.getExt()).build());
             } catch (PreBidException e) {
                 return Result.withError(BidderError.badInput(e.getMessage()));
             }
         }
 
-        return Result.withValue(createRequest(request, modifiedImps, requestPubId));
+        final String url = endpointUrl.replace(URL_PUBLISHER_ID_MACRO, StringUtils.defaultString(requestPubId));
+        return Result.withValue(BidderUtil.defaultRequest(request, url, mapper));
     }
 
     private ExtImpOnetag parseImpExt(Imp imp) {
@@ -69,8 +66,8 @@ private ExtImpOnetag parseImpExt(Imp imp) {
         }
     }
 
-    private String resolveAndValidatePubId(String impExtPubId, String requestPubId) {
-        if (StringUtils.isEmpty(impExtPubId)) {
+    private static String resolveAndValidatePubId(String impExtPubId, String requestPubId) {
+        if (StringUtils.isBlank(impExtPubId)) {
             throw new PreBidException("The publisher ID must not be empty");
         }
         if (requestPubId != null && !impExtPubId.equals(requestPubId)) {
@@ -79,13 +76,6 @@ private String resolveAndValidatePubId(String impExtPubId, String requestPubId)
         return impExtPubId;
     }
 
-    private HttpRequest<BidRequest> createRequest(BidRequest request, List<Imp> imps, String pubId) {
-        final String url = endpointUrl.replace(URL_PUBLISHER_ID_MACRO, pubId);
-        final BidRequest outgoingRequest = request.toBuilder().imp(imps).build();
-
-        return BidderUtil.defaultRequest(outgoingRequest, url, mapper);
-    }
-
     @Override
     public final Result<List<BidderBid>> makeBids(BidderCall<BidRequest> httpCall, BidRequest bidRequest) {
         try {
diff --git a/src/test/java/org/prebid/server/bidder/onetag/OnetagBidderTest.java b/src/test/java/org/prebid/server/bidder/onetag/OnetagBidderTest.java
index 0d742960bc1..73d6035303d 100644
--- a/src/test/java/org/prebid/server/bidder/onetag/OnetagBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/onetag/OnetagBidderTest.java
@@ -103,29 +103,6 @@ public void makeHttpRequestsShouldReturnErrorIfImpExtCanNotBeParsed() {
         assertThat(result.getValue()).isEmpty();
     }
 
-    @Test
-    public void makeHttpRequestsShouldUpdateImpExt() {
-        // given
-        final ObjectNode oneTagExt = mapper.createObjectNode();
-        oneTagExt.put("someField", "someName");
-        final BidRequest bidRequest = BidRequest.builder()
-                .imp(singletonList(Imp.builder()
-                        .ext(mapper.valueToTree(ExtPrebid.of(null, ExtImpOnetag.of("somePubId", oneTagExt))))
-                        .build()))
-                .build();
-
-        // when
-        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
-
-        // then
-        assertThat(result.getErrors()).isEmpty();
-        assertThat(result.getValue())
-                .extracting(HttpRequest::getPayload)
-                .flatExtracting(BidRequest::getImp)
-                .extracting(Imp::getExt)
-                .containsExactly(oneTagExt);
-    }
-
     @Test
     public void makeHttpRequestsShouldReturnErrorIfPubIdNotPresent() {
         // given
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/onetag/test-onetag-bid-request.json b/src/test/resources/org/prebid/server/it/openrtb2/onetag/test-onetag-bid-request.json
index 27f8b3dfba7..b0d37448267 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/onetag/test-onetag-bid-request.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/onetag/test-onetag-bid-request.json
@@ -12,8 +12,14 @@
       "displaymanagerver": "2.0.0",
       "tagid": "possibleTagId",
       "ext": {
-        "key1": "value1",
-        "key2": "value2"
+        "tid": "${json-unit.any-string}",
+        "bidder": {
+          "pubId": "386276e072",
+          "ext": {
+            "key1": "value1",
+            "key2": "value2"
+          }
+        }
       }
     }
   ],