diff --git a/definitions/scenario/scenarios.yaml b/definitions/scenario/scenarios.yaml
index 372b07a..3bb767f 100644
--- a/definitions/scenario/scenarios.yaml
+++ b/definitions/scenario/scenarios.yaml
@@ -130,6 +130,14 @@
 - WP3_Task3.2|Infrastructures|High EV flexibility
 - WP3_Task3.2|Infrastructures|Conservative EV flexibility
 
+# ECEMF - Work package 3 task 3.4 scenarios
+- WP3_Task3.4|Markets|Optimized
+- WP3_Task3.4|Markets|High-RES
+- WP3_Task3.4|Markets|Medium-RES
+- WP3_Task3.4|Markets|Low-RES
+- WP3_Task3.4|Markets|Medium-Cooperation
+- WP3_Task3.4|Markets|High-PV
+
 # ECEMF - Work package 4 task 4.2 scenarios
 - WP4|Residential|Digitalization in Residential Sector|Reference
 - WP4|Residential|Digitalization in Residential Sector|Prosumaging