diff --git a/adapters/outbrain/outbrain.go b/adapters/outbrain/outbrain.go
index 282a6d53aa0..6b121cb4732 100644
--- a/adapters/outbrain/outbrain.go
+++ b/adapters/outbrain/outbrain.go
@@ -43,8 +43,10 @@ func (a *adapter) MakeRequests(request *openrtb2.BidRequest, requestInfo *adapte
 			errs = append(errs, err)
 			continue
 		}
-		imp.TagID = outbrainExt.TagId
-		reqCopy.Imp[i] = imp
+		if outbrainExt.TagId != "" {
+			imp.TagID = outbrainExt.TagId
+			reqCopy.Imp[i] = imp
+		}
 	}
 
 	publisher := &openrtb2.Publisher{
diff --git a/adapters/outbrain/outbraintest/supplemental/general_params.json b/adapters/outbrain/outbraintest/supplemental/general_params.json
new file mode 100644
index 00000000000..b2a547c8b4e
--- /dev/null
+++ b/adapters/outbrain/outbraintest/supplemental/general_params.json
@@ -0,0 +1,139 @@
+{
+  "mockBidRequest": {
+    "id": "test-request-id",
+    "imp": [
+      {
+        "id": "test-imp-id",
+        "banner": {
+          "format": [
+            {
+              "w": 300,
+              "h": 250
+            }
+          ]
+        },
+        "tagid": "tag-id",
+        "ext": {
+          "bidder": {
+            "publisher": {
+              "id": "publisher-id"
+            }
+          }
+        }
+      }
+    ],
+    "bcat": ["bad-category"],
+    "badv": ["bad-advertiser"],
+    "site": {
+      "page": "http://example.com"
+    },
+    "device": {
+      "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36",
+      "h": 500,
+      "w": 1000
+    }
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "http://example.com/bid",
+        "body": {
+          "id": "test-request-id",
+          "imp": [
+            {
+              "id": "test-imp-id",
+              "banner": {
+                "format": [
+                  {
+                    "w": 300,
+                    "h": 250
+                  }
+                ]
+              },
+              "tagid": "tag-id",
+              "ext": {
+                "bidder": {
+                  "publisher": {
+                    "id": "publisher-id"
+                  }
+                }
+              }
+            }
+          ],
+          "bcat": ["bad-category"],
+          "badv": ["bad-advertiser"],
+          "site": {
+            "page": "http://example.com",
+            "publisher": {
+              "id": "publisher-id"
+            }
+          },
+          "device": {
+            "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36",
+            "h": 500,
+            "w": 1000
+          }
+        }
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "5095a742-1c27-402b-ab6f-66b1bd53383b",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "test-request-id",
+                  "impid": "test-imp-id",
+                  "price": 1000,
+                  "nurl": "http://example.com/win/1000",
+                  "adm": "<div>ad</div>",
+                  "adomain": [
+                    "example.com"
+                  ],
+                  "cid": "test-cid",
+                  "crid": "test-crid",
+                  "cat": [
+                    "IAB13-4"
+                  ],
+                  "w": 300,
+                  "h": 250
+                }
+              ],
+              "seat": "acc-1876"
+            }
+          ],
+          "bidid": "43ccadf2-8b2e-11eb-b294-de4c49e99ff6",
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "USD",
+      "bids": [
+        {
+          "bid": {
+            "id": "test-request-id",
+            "impid": "test-imp-id",
+            "price": 1000,
+            "nurl": "http://example.com/win/1000",
+            "adm": "<div>ad</div>",
+            "adomain": [
+              "example.com"
+            ],
+            "cid": "test-cid",
+            "crid": "test-crid",
+            "cat": [
+              "IAB13-4"
+            ],
+            "w": 300,
+            "h": 250
+          },
+          "type": "banner"
+        }
+      ]
+    }
+  ]
+}
diff --git a/adapters/outbrain/outbraintest/supplemental/optional_params.json b/adapters/outbrain/outbraintest/supplemental/optional_params.json
index a69ceaa0c85..d75875e0e70 100644
--- a/adapters/outbrain/outbraintest/supplemental/optional_params.json
+++ b/adapters/outbrain/outbraintest/supplemental/optional_params.json
@@ -12,6 +12,7 @@
             }
           ]
         },
+        "tagid": "should-be-overwritten-tagid",
         "ext": {
           "bidder": {
             "publisher": {
@@ -26,6 +27,8 @@
         }
       }
     ],
+    "bcat": ["should-be-overwritten-bcat"],
+    "badv": ["should-be-overwritten-badv"],
     "site": {
       "page": "http://example.com"
     },