diff --git a/adapters/adnuntius/adnuntius.go b/adapters/adnuntius/adnuntius.go
index a3024c38d1b..e329c876c02 100644
--- a/adapters/adnuntius/adnuntius.go
+++ b/adapters/adnuntius/adnuntius.go
@@ -169,7 +169,7 @@ func makeEndpointUrl(ortbRequest openrtb2.BidRequest, a *adapter, noCookies bool
 	}
 
 	q.Set("tzo", fmt.Sprint(tzo))
-	q.Set("format", "prebid")
+	q.Set("format", "prebidServer")
 
 	url := endpointUrl + "?" + q.Encode()
 	return url, nil
diff --git a/adapters/adnuntius/adnuntiustest/exemplary/simple-banner.json b/adapters/adnuntius/adnuntiustest/exemplary/simple-banner.json
index 49c74ad6683..94cef1d94de 100644
--- a/adapters/adnuntius/adnuntiustest/exemplary/simple-banner.json
+++ b/adapters/adnuntius/adnuntiustest/exemplary/simple-banner.json
@@ -31,7 +31,7 @@
     "httpCalls": [
         {
             "expectedRequest": {
-                "uri": "http://whatever.url?format=prebid&tzo=0",
+                "uri": "http://whatever.url?format=prebidServer&tzo=0",
                 "body": {
                     "adUnits": [
                         {
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-dealId.json b/adapters/adnuntius/adnuntiustest/supplemental/check-dealId.json
index 7869fa87f94..ffd51edcf28 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-dealId.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-dealId.json
@@ -31,7 +31,7 @@
   "httpCalls": [
       {
           "expectedRequest": {
-              "uri": "http://whatever.url?format=prebid&tzo=0",
+              "uri": "http://whatever.url?format=prebidServer&tzo=0",
               "body": {
                   "adUnits": [
                       {
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName-omitted.json b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName-omitted.json
index 0b44aa16dca..591ee3909b4 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName-omitted.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName-omitted.json
@@ -45,7 +45,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName.json b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName.json
index 7999bd476aa..98498aaa007 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-legalName.json
@@ -45,7 +45,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-omitted.json b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-omitted.json
index 11cea9bcf66..e625fa63f7b 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-omitted.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-dsa-advertiser-omitted.json
@@ -45,7 +45,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-gdpr.json b/adapters/adnuntius/adnuntiustest/supplemental/check-gdpr.json
index 296aa4894a4..4fc36ecd039 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-gdpr.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-gdpr.json
@@ -38,7 +38,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://gdpr.url?consentString=CONSENT_STRING&format=prebid&gdpr=1&tzo=0",
+				"uri": "http://gdpr.url?consentString=CONSENT_STRING&format=prebidServer&gdpr=1&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-gross-bids.json b/adapters/adnuntius/adnuntiustest/supplemental/check-gross-bids.json
index 95c77e464a9..7d3b00d1950 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-gross-bids.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-gross-bids.json
@@ -31,7 +31,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-net-bids.json b/adapters/adnuntius/adnuntiustest/supplemental/check-net-bids.json
index 236d9f6d489..055ae55bab4 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-net-bids.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-net-bids.json
@@ -31,7 +31,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies-parameter.json b/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies-parameter.json
index 7104b6b0580..ef5524c8404 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies-parameter.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies-parameter.json
@@ -31,7 +31,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&noCookies=true&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&noCookies=true&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies.json b/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies.json
index f60f7a636a9..b05424d861b 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-noCookies.json
@@ -35,7 +35,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&noCookies=true&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&noCookies=true&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-order-multi-imp.json b/adapters/adnuntius/adnuntiustest/supplemental/check-order-multi-imp.json
index 2269297d9cd..c58fc55f871 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-order-multi-imp.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-order-multi-imp.json
@@ -51,7 +51,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/check-userId.json b/adapters/adnuntius/adnuntiustest/supplemental/check-userId.json
index 2263798d3e5..5a12c4b0008 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/check-userId.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/check-userId.json
@@ -30,7 +30,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/empty-regs-ext.json b/adapters/adnuntius/adnuntiustest/supplemental/empty-regs-ext.json
index 211416294ce..eadb86f2dbb 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/empty-regs-ext.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/empty-regs-ext.json
@@ -33,7 +33,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/empty-regs.json b/adapters/adnuntius/adnuntiustest/supplemental/empty-regs.json
index 2d3d0c861d0..1c5452674f8 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/empty-regs.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/empty-regs.json
@@ -32,7 +32,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/height-error.json b/adapters/adnuntius/adnuntiustest/supplemental/height-error.json
index 4f066aa7e1f..fa2107830aa 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/height-error.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/height-error.json
@@ -30,7 +30,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/max-deals-test.json b/adapters/adnuntius/adnuntiustest/supplemental/max-deals-test.json
index 9a2f24bdc45..b018118fafc 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/max-deals-test.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/max-deals-test.json
@@ -32,7 +32,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/send-header-information.json b/adapters/adnuntius/adnuntiustest/supplemental/send-header-information.json
index 2383cd4e3e7..36d5a05bc18 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/send-header-information.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/send-header-information.json
@@ -50,7 +50,7 @@
 						"Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Mobile Safari/537.36"
 					]
 				},
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/site-ext.json b/adapters/adnuntius/adnuntiustest/supplemental/site-ext.json
index ddf37962054..1ac96757b23 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/site-ext.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/site-ext.json
@@ -37,7 +37,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/size-check.json b/adapters/adnuntius/adnuntiustest/supplemental/size-check.json
index f39586d9b9f..e6defc341da 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/size-check.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/size-check.json
@@ -28,7 +28,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&noCookies=true&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&noCookies=true&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/status-400.json b/adapters/adnuntius/adnuntiustest/supplemental/status-400.json
index 695aeb36e0d..5a0b4606735 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/status-400.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/status-400.json
@@ -27,7 +27,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/test-networks.json b/adapters/adnuntius/adnuntiustest/supplemental/test-networks.json
index b81e51cd3d9..870df0b8f6b 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/test-networks.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/test-networks.json
@@ -32,7 +32,7 @@
 	"httpCalls": [
 			{
 					"expectedRequest": {
-							"uri": "http://whatever.url?format=prebid&tzo=0",
+							"uri": "http://whatever.url?format=prebidServer&tzo=0",
 							"body": {
 									"adUnits": [
 											{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/user-ext.json b/adapters/adnuntius/adnuntiustest/supplemental/user-ext.json
index 2c2dcac1575..5b0e50d1144 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/user-ext.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/user-ext.json
@@ -39,7 +39,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{
diff --git a/adapters/adnuntius/adnuntiustest/supplemental/width-error.json b/adapters/adnuntius/adnuntiustest/supplemental/width-error.json
index 96d98a98b85..c5633717c72 100644
--- a/adapters/adnuntius/adnuntiustest/supplemental/width-error.json
+++ b/adapters/adnuntius/adnuntiustest/supplemental/width-error.json
@@ -30,7 +30,7 @@
 	"httpCalls": [
 		{
 			"expectedRequest": {
-				"uri": "http://whatever.url?format=prebid&tzo=0",
+				"uri": "http://whatever.url?format=prebidServer&tzo=0",
 				"body": {
 					"adUnits": [
 						{