diff --git a/testsuite/model/pom.xml b/testsuite/model/pom.xml
index 7acbeafe7b..41c7ef2ee5 100644
--- a/testsuite/model/pom.xml
+++ b/testsuite/model/pom.xml
@@ -161,7 +161,7 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <configuration>
                     <!-- See also https://github.com/wildfly/wildfly-core/blob/7e5624cf92ebe4b64a4793a8c0b2a340c0d6d363/core-feature-pack/common/src/main/resources/content/bin/common.sh#L57-L60 -->
-                    <argLine>@{argLine} -Xmx1024m -XX:+ExitOnOutOfMemoryError -XX:+HeapDumpOnOutOfMemoryError --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED</argLine>
+                    <argLine>@{argLine} -Xmx1536m -XX:+ExitOnOutOfMemoryError -XX:+HeapDumpOnOutOfMemoryError --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED</argLine>
                     <systemPropertyVariables>
                         <!-- keycloak.model.parameters lists parameter classes from 
                              org.keycloak.model.parameters package and determine enabled providers -->