diff --git a/extensions/kubernetes/openshift/deployment/src/test/java/io/quarkus/openshift/deployment/config/OpenshiftConfigFallbackTest.java b/extensions/kubernetes/openshift/deployment/src/test/java/io/quarkus/openshift/deployment/config/OpenshiftConfigFallbackTest.java
index dabca1dacb383..0bb57f8311245 100644
--- a/extensions/kubernetes/openshift/deployment/src/test/java/io/quarkus/openshift/deployment/config/OpenshiftConfigFallbackTest.java
+++ b/extensions/kubernetes/openshift/deployment/src/test/java/io/quarkus/openshift/deployment/config/OpenshiftConfigFallbackTest.java
@@ -1,9 +1,16 @@
 package io.quarkus.openshift.deployment.config;
 
+import static java.util.stream.Collectors.toSet;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.nio.file.Path;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
@@ -21,6 +28,8 @@ public class OpenshiftConfigFallbackTest {
             .overrideConfigKey("quarkus.kubernetes.replicas", "10")
             .overrideConfigKey("quarkus.openshift.version", "999-SNAPSHOT")
             .overrideConfigKey("quarkus.openshift.labels.app", "openshift")
+            .overrideConfigKey("quarkus.openshift.route.expose", "true")
+            .setLogRecordPredicate(record -> record.getLevel().intValue() >= Level.WARNING.intValue())
             .setRun(true);
 
     @ProdBuildResults
@@ -28,6 +37,16 @@ public class OpenshiftConfigFallbackTest {
 
     @Test
     void configFallback() throws Exception {
+        List<LogRecord> logRecords = prodModeTestResults.getRetainedBuildLogRecords();
+        Set<Object> unrecognized = logRecords.stream()
+                .filter(logRecord -> logRecord.getMessage().startsWith("Unrecognized configuration key"))
+                .map(logRecord -> Optional.ofNullable(logRecord.getParameters())
+                        .map(parameters -> parameters[0])
+                        .orElse(new Object[0]))
+                .collect(toSet());
+
+        assertTrue(unrecognized.isEmpty());
+
         Path kubernetesDir = prodModeTestResults.getBuildDir().resolve("kubernetes");
         YamlConfigSource kubernetes = new YamlConfigSource(kubernetesDir.resolve("kubernetes.yml").toUri().toURL());
         YamlConfigSource openshift = new YamlConfigSource(kubernetesDir.resolve("openshift.yml").toUri().toURL());
diff --git a/extensions/kubernetes/vanilla/runtime/src/main/java/io/quarkus/kubernetes/runtime/config/KubernetesConfigFallback.java b/extensions/kubernetes/vanilla/runtime/src/main/java/io/quarkus/kubernetes/runtime/config/KubernetesConfigFallback.java
index c5d4d112e3b3b..9ee238563c076 100644
--- a/extensions/kubernetes/vanilla/runtime/src/main/java/io/quarkus/kubernetes/runtime/config/KubernetesConfigFallback.java
+++ b/extensions/kubernetes/vanilla/runtime/src/main/java/io/quarkus/kubernetes/runtime/config/KubernetesConfigFallback.java
@@ -1,27 +1,30 @@
 package io.quarkus.kubernetes.runtime.config;
 
+import java.util.Iterator;
 import java.util.function.Function;
 
+import io.smallrye.config.ConfigSourceInterceptorContext;
 import io.smallrye.config.FallbackConfigSourceInterceptor;
 
 public class KubernetesConfigFallback extends FallbackConfigSourceInterceptor {
-    private static final String QUARKUS_KUBERNETES_CONFIG_PREFIX = "quarkus.kubernetes.";
-    private static final String QUARKUS_OPENSHIFT_CONFIG_PREFIX = "quarkus.openshift.";
-    private static final int OPENSHIFT_CONFIG_NAME_BEGIN = QUARKUS_OPENSHIFT_CONFIG_PREFIX.length();
-    private static final String QUARKUS_KNATIVE_CONFIG_PREFIX = "quarkus.knative.";
-    private static final int KNATIVE_CONFIG_NAME_BEGIN = QUARKUS_KNATIVE_CONFIG_PREFIX.length();
-
     public KubernetesConfigFallback() {
-        super(new Function<String, String>() {
-            @Override
-            public String apply(final String name) {
-                if (name.startsWith(QUARKUS_OPENSHIFT_CONFIG_PREFIX)) {
-                    return QUARKUS_KUBERNETES_CONFIG_PREFIX + name.substring(OPENSHIFT_CONFIG_NAME_BEGIN);
-                } else if (name.startsWith(QUARKUS_KNATIVE_CONFIG_PREFIX)) {
-                    return QUARKUS_KUBERNETES_CONFIG_PREFIX + name.substring(KNATIVE_CONFIG_NAME_BEGIN);
-                }
-                return name;
+        super(new FallbackToKubernetesConfig());
+    }
+
+    @Override
+    public Iterator<String> iterateNames(final ConfigSourceInterceptorContext context) {
+        return context.iterateNames();
+    }
+
+    private static class FallbackToKubernetesConfig implements Function<String, String> {
+        @Override
+        public String apply(final String name) {
+            if (name.startsWith("quarkus.openshift.")) {
+                return "quarkus.kubernetes." + name.substring(18);
+            } else if (name.startsWith("quarkus.knative.")) {
+                return "quarkus.kubernetes." + name.substring(16);
             }
-        });
+            return name;
+        }
     }
 }