diff --git a/test/config.myopic.yaml b/test/config.myopic.yaml
index 5155872d..943a8aa6 100644
--- a/test/config.myopic.yaml
+++ b/test/config.myopic.yaml
@@ -52,6 +52,6 @@ renewable:
 
 solving:
   solver:
-    name: cbc
-    options: cbc-default
+    name: glpk
+    options: glpk-default
   mem: 4000
diff --git a/test/config.overnight.yaml b/test/config.overnight.yaml
index 10ab463f..b4ad9811 100644
--- a/test/config.overnight.yaml
+++ b/test/config.overnight.yaml
@@ -52,6 +52,6 @@ sector:
 
 solving:
   solver:
-    name: cbc
-    options: cbc-default
+    name: glpk
+    options: glpk-default
   mem: 4000