diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 3dc438e..9fa843f 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -9,10 +9,9 @@
 name: Java CI with Maven
 
 on:
-  push:
-    branches: [ "main" ]
-  pull_request_target:
-    branches: [ "main" ]
+  pull_request:
+    branches:
+      - main
 
 jobs:
   regression-tests:
diff --git a/pom.xml b/pom.xml
index 7ebdbae..b9fc919 100644
--- a/pom.xml
+++ b/pom.xml
@@ -203,6 +203,19 @@
             <version>2.18.3</version>
         </dependency>
 
+        <!-- JUnit -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.9.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>1.2.0</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <scm>
diff --git a/src/test/java/AppTest.java b/src/test/java/AppTest.java
index 48a5c80..eff9e57 100644
--- a/src/test/java/AppTest.java
+++ b/src/test/java/AppTest.java
@@ -333,7 +333,7 @@ public void jsonSchemaTest() {
        JsonNode petSchema = MappingUtilities.Json.Schema.getJsonNodeFor(Pet.class);
        Assert.assertEquals(
                "Generated json schema did not match the expected one!",
-               "{\"type\":\"object\",\"properties\":{\"id\":{\"type\":\"integer\"},\"category\":{\"type\":\"any\"},\"name\":{\"type\":\"string\"},\"photoUrls\":{\"type\":\"array\",\"items\":{\"type\":\"string\"}},\"tags\":{\"type\":\"array\",\"items\":{\"type\":\"any\"}},\"status\":{\"type\":\"string\"}}}",
+               "{\"type\":\"object\",\"properties\":{\"id\":{\"type\":\"integer\"},\"category\":{\"type\":\"object\",\"properties\":{\"id\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"}}},\"name\":{\"type\":\"string\"},\"photoUrls\":{\"type\":\"array\",\"items\":{\"type\":\"string\"}},\"tags\":{\"type\":\"array\",\"items\":{\"type\":\"object\",\"properties\":{\"id\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"}}}},\"status\":{\"type\":\"string\"}}}",
                petSchema.toString()
        );
     }