diff --git a/pom.xml b/pom.xml
index 8410f415..5d219b4e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -75,6 +75,12 @@
       <artifactId>guice</artifactId>
       <version>6.0.0</version>
     </dependency>
+    <dependency>
+      <!-- Required for project validation -->
+      <groupId>javax.ws.rs</groupId>
+      <artifactId>javax.ws.rs-api</artifactId>
+      <version>2.1.1</version>
+    </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-plugin-api</artifactId>
diff --git a/src/main/java/ch/ivyteam/ivy/maven/compile/ValidateProjectMojo.java b/src/main/java/ch/ivyteam/ivy/maven/compile/ValidateProjectMojo.java
index 6bf65053..941a06b9 100644
--- a/src/main/java/ch/ivyteam/ivy/maven/compile/ValidateProjectMojo.java
+++ b/src/main/java/ch/ivyteam/ivy/maven/compile/ValidateProjectMojo.java
@@ -17,8 +17,10 @@
 import ch.ivyteam.ivy.project.validation.ProjectValidator;
 import ch.ivyteam.ivy.project.validation.ProjectValidatorContext;
 import ch.ivyteam.ivy.project.validation.ProjectValidatorResult.Message;
+import ch.ivyteam.ivy.rest.client.config.impl.RestClientProjectValidator;
 import ch.ivyteam.ivy.role.impl.RoleProjectValidator;
 import ch.ivyteam.ivy.user.impl.UserProjectValidator;
+import ch.ivyteam.ivy.vars.impl.VariableProjectValidator;
 import ch.ivyteam.ivy.webservice.datamodel.impl.WebServiceClientProjectValidator;
 
 /**
@@ -67,7 +69,9 @@ private List<ProjectValidator> validators() {
     return List.of(
         new UserProjectValidator(),
         new RoleProjectValidator(),
-        new WebServiceClientProjectValidator());
+        new WebServiceClientProjectValidator(),
+        new VariableProjectValidator(),
+        new RestClientProjectValidator());
   }
 
   private void log(Message message) {
@@ -93,7 +97,7 @@ private ContextBuilder(MavenProject project, MavenSession session) {
     }
 
     private ProjectValidatorContext build() {
-      return ProjectValidatorContext.create(toProject(), toAllProjects());
+      return ProjectValidatorContext.create().project(toProject()).allProjects(toAllProjects()).toContext();
     }
 
     private Project toProject() {
diff --git a/src/test/java/ch/ivyteam/ivy/maven/compile/TestValidateProjectMojo.java b/src/test/java/ch/ivyteam/ivy/maven/compile/TestValidateProjectMojo.java
index 1cd2e58a..d866c559 100644
--- a/src/test/java/ch/ivyteam/ivy/maven/compile/TestValidateProjectMojo.java
+++ b/src/test/java/ch/ivyteam/ivy/maven/compile/TestValidateProjectMojo.java
@@ -60,14 +60,34 @@ void validate() throws IOException {
       """;
     Files.writeString(file, content);
 
+    file = dir.resolve("rest-clients.yaml");
+    content = """
+      RestClients:
+        test name:
+          Name: Test
+        test.name:
+          Name: Another
+      """;
+    Files.writeString(file, content);
+
+    file = dir.resolve("variables.yaml");
+    content = """
+      Variables:
+        Test: Something
+        Test: Something else
+      """;
+    Files.writeString(file, content);
     var log = new LogCollector();
     mojo.setLog(log);
     mojo.execute();
     assertThat(log.getWarnings().toString())
         .contains("config/users.yaml: User 'Alex' is configured to have role 'Gangster' which is not defined.")
         .contains("config/webservice-clients.yaml: The web service client key 'test.name' should be sanitized to 'testname' to avoid potential issues. Use the name for a better readability.")
-        .contains("config/webservice-clients.yaml: The web service client key 'test name' should be sanitized to 'test-name' to avoid potential issues. Use the name for a better readability.");
+        .contains("config/webservice-clients.yaml: The web service client key 'test name' should be sanitized to 'test-name' to avoid potential issues. Use the name for a better readability.")
+        .contains("config/rest-clients.yaml: The rest client key 'test.name' should be sanitized to 'testname' to avoid potential issues. Use the name for a better readability.")
+        .contains("config/rest-clients.yaml: The rest client key 'test name' should be sanitized to 'test-name' to avoid potential issues. Use the name for a better readability.");
     assertThat(log.getErrors().toString())
-        .contains("config/roles.yaml: Role 'HR Manager' has an unknown parent 'Manager'.");
+        .contains("config/roles.yaml: Role 'HR Manager' has an unknown parent 'Manager'.")
+        .contains("config/variables.yaml: Variable 'Test' is defined multiple times in variables.yaml.");
   }
 }