diff --git a/jsonschema-module-expressive-annotations/src/main/java/io/github/axonivy/json/schema/ExpressiveSchemaModule.java b/jsonschema-module-expressive-annotations/src/main/java/io/github/axonivy/json/schema/ExpressiveSchemaModule.java
index 527c266..0b11575 100644
--- a/jsonschema-module-expressive-annotations/src/main/java/io/github/axonivy/json/schema/ExpressiveSchemaModule.java
+++ b/jsonschema-module-expressive-annotations/src/main/java/io/github/axonivy/json/schema/ExpressiveSchemaModule.java
@@ -11,6 +11,7 @@
 import com.github.victools.jsonschema.generator.Module;
 import com.github.victools.jsonschema.generator.SchemaGeneratorConfigBuilder;
 
+import io.github.axonivy.json.schema.annotations.Conditional;
 import io.github.axonivy.json.schema.impl.ConditionalFieldProvider;
 import io.github.axonivy.json.schema.impl.ConfigNamingStrategy;
 import io.github.axonivy.json.schema.impl.CustomTypeProvider;
@@ -45,7 +46,8 @@ public void applyToConfigBuilder(SchemaGeneratorConfigBuilder configBuilder) {
     configBuilder.forFields()
       .withCustomDefinitionProvider(new RemoteRefProvider(refs))
       .withCustomDefinitionProvider(new ExamplesProvider())
-      .withCustomDefinitionProvider(new CustomTypeProvider());
+      .withCustomDefinitionProvider(new CustomTypeProvider())
+      .withIgnoreCheck(f -> f.getAnnotation(Conditional.class) != null);
 
     if (options.contains(ExpressiveSchemaOption.USE_ADDITIONAL_PROPERTIES_ANNOTATION)) {
       configBuilder.forTypesInGeneral()
diff --git a/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestFieldCondition.java b/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestFieldCondition.java
index 74dccdb..d7c4752 100644
--- a/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestFieldCondition.java
+++ b/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestFieldCondition.java
@@ -1,5 +1,6 @@
 package io.github.axonivy.json.schema.tests;
 
+import static io.github.axonivy.json.schema.tests.TestImplementationTypes.namesOf;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import java.util.ArrayList;
@@ -93,11 +94,15 @@ public static class ComplexType {
   void conditionalOtherProp() {
     ObjectNode schema = new ExpressiveSchemaGenerator().generateSchema(MyConditionalFieldSibling.class);
 
+    assertThat(namesOf(schema.get("properties")))
+      .as("conditional fields are not listed as classic 'properties'")
+      .containsOnly("$schema", "provider");
+
     JsonNode ifProvider = schema.get("if").get("properties").get("provider");
     assertThat(ifProvider.get("const").asText())
       .isEqualTo("azure");
 
-    JsonNode thenProperty = schema.get("then").get("properties").get("always");
+    JsonNode thenProperty = schema.get("then").get("properties").get("ifAzure");
     assertThat(thenProperty.get("$ref").asText())
       .isEqualTo("#/$defs/ComplexType");
   }
@@ -108,7 +113,7 @@ static class MyConditionalFieldSibling {
     public String provider;
 
     @Conditional(ifProperty = "provider", hasConst = { "azure" })
-    public ComplexType always;
+    private ComplexType ifAzure;
 
     public static class ComplexType {
       public String name;
diff --git a/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestImplementationTypes.java b/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestImplementationTypes.java
index 654e868..f5605d6 100644
--- a/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestImplementationTypes.java
+++ b/jsonschema-module-expressive-annotations/src/test/java/io/github/axonivy/json/schema/tests/TestImplementationTypes.java
@@ -154,7 +154,7 @@ void types_withoutContainer() {
   }
 
 
-  private static List<String> namesOf(JsonNode defs) {
+  static List<String> namesOf(JsonNode defs) {
     var names = new ArrayList<String>();
     defs.fieldNames().forEachRemaining(names::add);
     return names;