diff --git a/roles/mail_server/molecule/default/molecule.yml b/roles/mail_server/molecule/default/molecule.yml
index b962e1bd5265e6e6691e300f09494dbb51c4b624..78a9d16e56bb14c21f86eec41543d0d29943929b 100644
--- a/roles/mail_server/molecule/default/molecule.yml
+++ b/roles/mail_server/molecule/default/molecule.yml
@@ -85,7 +85,7 @@ platforms:
       - parameters-mandatory
       - jessie
     box: debian/contrib-jessie64
-    memory: 512
+    memory: 1024
     cpus: 1
     interfaces:
       - auto_config: true
@@ -98,7 +98,7 @@ platforms:
       - parameters-optional
       - jessie
     box: debian/contrib-jessie64
-    memory: 512
+    memory: 1024
     cpus: 1
     interfaces:
       - auto_config: true
@@ -111,7 +111,7 @@ platforms:
       - parameters-mandatory
       - stretch
     box: debian/contrib-stretch64
-    memory: 512
+    memory: 1024
     cpus: 1
     interfaces:
       - auto_config: true
@@ -124,7 +124,7 @@ platforms:
       - parameters-optional
       - stretch
     box: debian/contrib-stretch64
-    memory: 512
+    memory: 1024
     cpus: 1
     interfaces:
       - auto_config: true