diff --git a/services/web/app/src/Features/ThirdPartyDataStore/TpdsController.js b/services/web/app/src/Features/ThirdPartyDataStore/TpdsController.js
index 6111189549..b4617a3d44 100644
--- a/services/web/app/src/Features/ThirdPartyDataStore/TpdsController.js
+++ b/services/web/app/src/Features/ThirdPartyDataStore/TpdsController.js
@@ -38,10 +38,7 @@ async function createProject(req, res) {
 async function mergeUpdate(req, res) {
   metrics.inc('tpds.merge-update')
   const { filePath, userId, projectId, projectName } = parseParams(req)
-  const source =
-    req.headers['x-sl-update-source'] ||
-    req.headers['x-update-source'] ||
-    'unknown'
+  const source = req.headers['x-update-source'] || 'unknown'
 
   let metadata
   try {
@@ -95,10 +92,7 @@ async function mergeUpdate(req, res) {
 async function deleteUpdate(req, res) {
   metrics.inc('tpds.delete-update')
   const { filePath, userId, projectId, projectName } = parseParams(req)
-  const source =
-    req.headers['x-sl-update-source'] ||
-    req.headers['x-update-source'] ||
-    'unknown'
+  const source = req.headers['x-update-source'] || 'unknown'
 
   await TpdsUpdateHandler.promises.deleteUpdate(
     userId,
@@ -147,10 +141,7 @@ async function updateFolder(req, res) {
 async function updateProjectContents(req, res, next) {
   const projectId = req.params.project_id
   const path = `/${req.params[0]}` // UpdateMerger expects leading slash
-  const source =
-    req.headers['x-sl-update-source'] ||
-    req.headers['x-update-source'] ||
-    'unknown'
+  const source = req.headers['x-update-source'] || 'unknown'
 
   try {
     await UpdateMerger.promises.mergeUpdate(null, projectId, path, req, source)
@@ -167,10 +158,7 @@ async function updateProjectContents(req, res, next) {
 async function deleteProjectContents(req, res, next) {
   const projectId = req.params.project_id
   const path = `/${req.params[0]}` // UpdateMerger expects leading slash
-  const source =
-    req.headers['x-sl-update-source'] ||
-    req.headers['x-update-source'] ||
-    'unknown'
+  const source = req.headers['x-update-source'] || 'unknown'
 
   await UpdateMerger.promises.deleteUpdate(null, projectId, path, source)
   res.sendStatus(200)
diff --git a/services/web/test/unit/src/ThirdPartyDataStore/TpdsControllerTests.js b/services/web/test/unit/src/ThirdPartyDataStore/TpdsControllerTests.js
index 8d970abce7..848f24f0ff 100644
--- a/services/web/test/unit/src/ThirdPartyDataStore/TpdsControllerTests.js
+++ b/services/web/test/unit/src/ThirdPartyDataStore/TpdsControllerTests.js
@@ -115,43 +115,6 @@ describe('TpdsController', function () {
       }
     })
 
-    it('should process the update with the update receiver by name and old header', function (done) {
-      this.req = {
-        params: {
-          0: `${this.projectName}${this.path}`,
-          user_id: this.user_id,
-          project_id: '',
-        },
-        headers: {
-          'x-sl-update-source': (this.source = 'dropbox'),
-        },
-      }
-      const res = {
-        json: payload => {
-          expect(payload).to.deep.equal({
-            status: 'applied',
-            projectId: this.metadata.projectId.toString(),
-            entityId: this.metadata.entityId.toString(),
-            folderId: this.metadata.folderId.toString(),
-            entityType: this.metadata.entityType,
-            rev: this.metadata.rev.toString(),
-          })
-          this.TpdsUpdateHandler.promises.newUpdate
-            .calledWith(
-              this.user_id,
-              '', // projectId
-              this.projectName,
-              this.path,
-              this.req,
-              this.source
-            )
-            .should.equal(true)
-          done()
-        },
-      }
-      this.TpdsController.mergeUpdate(this.req, res)
-    })
-
     it('should process the update with the update receiver by name', function (done) {
       const res = {
         json: payload => {