diff --git a/adapters/pubmatic/pubmatic_test.go b/adapters/pubmatic/pubmatic_test.go
index d28ade74efb..8ed2ccd391c 100644
--- a/adapters/pubmatic/pubmatic_test.go
+++ b/adapters/pubmatic/pubmatic_test.go
@@ -20,8 +20,6 @@ import (
 	"github.com/prebid/prebid-server/openrtb_ext"
 	"github.com/prebid/prebid-server/pbs"
 	"github.com/prebid/prebid-server/usersync"
-
-	"github.com/stretchr/testify/assert"
 )
 
 func TestJsonSamples(t *testing.T) {
@@ -730,36 +728,3 @@ func TestGetBidTypeForUnsupportedCode(t *testing.T) {
 		t.Errorf("Expected Bid Type value was: %v, actual value is: %v", openrtb_ext.BidTypeBanner, actualBidTypeValue)
 	}
 }
-
-func TestMakeRequestsTrimsPubID(t *testing.T) {
-	var a PubmaticAdapter
-	a.URI = "http://test.com/openrtb2"
-
-	var bidderExt adapters.ExtImpBidder
-	extImpPubMatic := openrtb_ext.ExtImpPubmatic{}
-	extImpPubMatic.PublisherId = " 5890 "
-	bidderExt.Bidder, _ = json.Marshal(extImpPubMatic)
-	extRaw, _ := json.Marshal(bidderExt)
-
-	var w, h uint64
-	w = 300
-	h = 250
-	var impression = openrtb.Imp{
-		Banner: &openrtb.Banner{
-			W: &w,
-			H: &h,
-		},
-		Ext: extRaw,
-	}
-	request := &openrtb.BidRequest{
-		Imp: []openrtb.Imp{impression},
-		Site: &openrtb.Site{
-			Publisher: &openrtb.Publisher{},
-		},
-	}
-	a.MakeRequests(request, nil)
-
-	updatedPubID := request.Site.Publisher.ID
-
-	assert.Equal(t, "5890", updatedPubID, "Publisher.ID field should be trimmed")
-}
diff --git a/adapters/pubmatic/pubmatictest/supplemental/trimPublisherID.json b/adapters/pubmatic/pubmatictest/supplemental/trimPublisherID.json
new file mode 100644
index 00000000000..6a344ee091a
--- /dev/null
+++ b/adapters/pubmatic/pubmatictest/supplemental/trimPublisherID.json
@@ -0,0 +1,159 @@
+{
+  "mockBidRequest": {
+    "id": "test-request-id",
+    "imp": [
+      {
+        "id": "test-imp-id",
+        "banner": {
+          "format": [
+            {
+              "w": 300,
+              "h": 250
+            }
+          ]
+        },
+        "ext": {
+          "bidder": {
+            "adSlot": "AdTag_Div1@300x250",
+            "publisherId": "  999  ",
+            "keywords": [
+              {
+                "key": "pmZoneID",
+                "value": [
+                  "Zone1",
+                  "Zone2"
+                ]
+              },
+              {
+                "key": "preference",
+                "value": [
+                  "sports",
+                  "movies"
+                ]
+              }
+            ],
+            "wrapper": {
+              "version": 1,
+              "profile": 5123
+            }
+          }
+        }
+      }
+    ],
+    "device": {
+      "ua": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
+    },
+    "site": {
+      "id": "siteID",
+      "publisher": {
+        "id": "1234"
+      }
+    }
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "https://hbopenbid.pubmatic.com/translator?source=prebid-server",
+        "body": {
+          "id": "test-request-id",
+          "imp": [
+            {
+              "id": "test-imp-id",
+              "tagid": "AdTag_Div1",
+              "banner": {
+                "format": [
+                  {
+                    "w": 300,
+                    "h": 250
+                  }
+                ],
+                "h": 250,
+                "w": 300
+              },
+              "ext": {
+                "pmZoneID": "Zone1,Zone2",
+                "preference": "sports,movies"
+              }
+            }
+          ],
+          "device": {
+            "ua": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
+          },
+          "site": {
+            "id": "siteID",
+            "publisher": {
+              "id": "999"
+            }
+          },
+          "ext": {
+            "wrapper": {
+              "profile": 5123,
+              "version": 1
+            }
+          }
+        }
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "test-request-id",
+          "seatbid": [
+            {
+              "seat": "958",
+              "bid": [
+                {
+                  "id": "7706636740145184841",
+                  "impid": "test-imp-id",
+                  "price": 0.500000,
+                  "adid": "29681110",
+                  "adm": "some-test-ad",
+                  "adomain": [
+                    "pubmatic.com"
+                  ],
+                  "crid": "29681110",
+                  "h": 250,
+                  "w": 300,
+                  "dealid": "test deal",
+                  "ext": {
+                    "dspid": 6,
+                    "deal_channel": 1
+                  }
+                }
+              ]
+            }
+          ],
+          "bidid": "5778926625248726496",
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "USD",
+      "bids": [
+        {
+          "bid": {
+            "id": "7706636740145184841",
+            "impid": "test-imp-id",
+            "price": 0.5,
+            "adid": "29681110",
+            "adm": "some-test-ad",
+            "adomain": [
+              "pubmatic.com"
+            ],
+            "crid": "29681110",
+            "w": 300,
+            "h": 250,
+            "dealid": "test deal",
+            "ext": {
+              "dspid": 6,
+              "deal_channel": 1
+            }
+          },
+          "type": "banner"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file