diff --git a/core/test-extension/deployment/src/main/resources/application.properties b/core/test-extension/deployment/src/main/resources/application.properties
index 9c904afc68904b..dba86f4b3a5a10 100644
--- a/core/test-extension/deployment/src/main/resources/application.properties
+++ b/core/test-extension/deployment/src/main/resources/application.properties
@@ -99,6 +99,11 @@ quarkus.rt.one-to-nine=one,two,three,four,five,six,seven,eight,nine
 quarkus.rt.map-of-numbers.key1=one
 quarkus.rt.map-of-numbers.key2=two
 
+### map configurations
+quarkus.rt.leaf-map.key.first=first-key-value
+quarkus.rt.leaf-map.key.second=second-key-value
+quarkus.rt.config-group-map.key.group.nested-value=value
+quarkus.rt.config-group-map.key.group.oov=value2.1+value2.2
 
 ### build time and run time configuration using enhanced converters
 quarkus.btrt.map-of-numbers.key1=one
diff --git a/core/test-extension/deployment/src/test/java/io/quarkus/extest/ConfiguredBeanTest.java b/core/test-extension/deployment/src/test/java/io/quarkus/extest/ConfiguredBeanTest.java
index 64cbf269e3e60f..bcf9d1092a31e5 100644
--- a/core/test-extension/deployment/src/test/java/io/quarkus/extest/ConfiguredBeanTest.java
+++ b/core/test-extension/deployment/src/test/java/io/quarkus/extest/ConfiguredBeanTest.java
@@ -204,6 +204,20 @@ public void validateRuntimeConfigMap() {
         Assertions.assertEquals(Arrays.asList("value1", "value2", "value3"), stringListMap.get("key1"));
         Assertions.assertEquals(Arrays.asList("value4", "value5"), stringListMap.get("key2"));
         Assertions.assertEquals(Collections.singletonList("value6"), stringListMap.get("key3"));
+
+        //quarkus.rt.leaf-map.key.first=first-key-value
+        //quarkus.rt.leaf-map.key.second=second-key-value
+
+        final Map<String, Map<String, String>> leafMap = runTimeConfig.leafMap;
+        Assertions.assertEquals("first-key-value", leafMap.get("key").get("first"));
+        Assertions.assertEquals("second-key-value", leafMap.get("key").get("second"));
+
+        //quarkus.rt.config-group-map.key.group.nested-value=value
+        //quarkus.rt.config-group-map.key.group.oov=value2.1+value2.2
+        final Map<String, Map<String, NestedConfig>> configGroupMap = runTimeConfig.configGroupMap;
+        NestedConfig nestedConfigFromMap = configGroupMap.get("key").get("group");
+        Assertions.assertEquals("value", nestedConfigFromMap.nestedValue);
+        Assertions.assertEquals(new ObjectOfValue("value2.1", "value2.2"), nestedConfigFromMap.oov);
     }
 
     /**
diff --git a/core/test-extension/runtime/src/main/java/io/quarkus/extest/runtime/config/TestRunTimeConfig.java b/core/test-extension/runtime/src/main/java/io/quarkus/extest/runtime/config/TestRunTimeConfig.java
index fe9ab9c45384ab..66d9c335790cec 100644
--- a/core/test-extension/runtime/src/main/java/io/quarkus/extest/runtime/config/TestRunTimeConfig.java
+++ b/core/test-extension/runtime/src/main/java/io/quarkus/extest/runtime/config/TestRunTimeConfig.java
@@ -28,6 +28,13 @@ public class TestRunTimeConfig {
     @ConfigItem
     public AllValuesConfig allValues;
 
+    /** A map of properties */
+    @ConfigItem
+    public Map<String, Map<String, String>> leafMap;
+    /** A map of property lists */
+    @ConfigItem
+    public Map<String, Map<String, NestedConfig>> configGroupMap;
+
     /**
      * Enum object
      */