diff --git a/src/rest/creator.js b/src/rest/creator.js
index 2c15bae792..5897ae2683 100644
--- a/src/rest/creator.js
+++ b/src/rest/creator.js
@@ -59,12 +59,12 @@ module.exports = class RestSessionCreator {
             '--no-admin',
             this.hsUrl
         ];
-        const registerCmd = `./scripts/register_new_matrix_user ${registerArgs.join(' ')}`;
+        const registerCmd = `./register_new_matrix_user ${registerArgs.join(' ')}`;
         const allCmds = [
             `cd ${this.synapseSubdir}`,
-            ". env/bin/activate",
+            ". activate",
             registerCmd
-        ].join('&&');
+        ].join(' && ');
 
         await execAsync(allCmds, {cwd: this.cwd, encoding: 'utf-8'});
     }
diff --git a/start.js b/start.js
index b98dc7f366..d19b232236 100644
--- a/start.js
+++ b/start.js
@@ -52,7 +52,7 @@ async function runTests() {
     }
 
     const restCreator = new RestSessionCreator(
-        'synapse/installations/consent',
+        'synapse/installations/consent/env/bin',
         hsUrl,
         __dirname
     );