diff --git a/.gitignore b/.gitignore
index 41e2fabd..c2d91ac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,6 @@ target/
 # IntelliJ
 /.idea
 *.iml
+
+# https://github.com/liquibase/liquibase/issues/2196
+/derby.log
diff --git a/pom.xml b/pom.xml
index 99061499..067ae70d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,7 +13,7 @@
     <parent>
         <groupId>com.powsybl</groupId>
         <artifactId>powsybl-parent-ws</artifactId>
-        <version>17</version>
+        <version>18</version>
         <relativePath/>
     </parent>
 
diff --git a/src/test/resources/application-default.yml b/src/test/resources/application-default.yml
index bf7e055a..b6ece3cb 100644
--- a/src/test/resources/application-default.yml
+++ b/src/test/resources/application-default.yml
@@ -15,7 +15,7 @@ logging:
 powsybl-ws:
   database:
     vendor: h2:mem
-    query: ;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
+    query: ;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;MODE=PostgreSQL;DEFAULT_NULL_ORDERING=HIGH
     hostPort: ":"