diff -r 6eec3213bec9 -r e2db422752b4 cubicweb/devtools/__init__.py
--- a/cubicweb/devtools/__init__.py	Thu Mar 28 10:11:36 2019 +0100
+++ b/cubicweb/devtools/__init__.py	Thu Mar 28 10:33:54 2019 +0100
@@ -43,8 +43,6 @@
 from cubicweb.server.serverconfig import ServerConfiguration
 from cubicweb.web.webconfig import WebConfigurationBase
 
-cwconfig.CubicWebConfiguration.cls_adjust_sys_path()
-
 # db auto-population configuration #############################################
 
 SYSTEM_ENTITIES = (schema.SCHEMA_TYPES