diff --git a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GerritSimulation.scala b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GerritSimulation.scala
index 7946f05..e26fc00 100644
--- a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GerritSimulation.scala
+++ b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GerritSimulation.scala
@@ -87,7 +87,7 @@
       replaceProperty("ssh_port", 29418, in)
   }
 
-  protected def getFullProjectName(projectName: String) {
+  protected def getFullProjectName(projectName: String): String = {
     getProperty("project_prefix", "") + projectName
   }