diff --git a/extensions/amazon-lambda/common-runtime/src/main/java/io/quarkus/amazon/lambda/runtime/AbstractLambdaPollLoop.java b/extensions/amazon-lambda/common-runtime/src/main/java/io/quarkus/amazon/lambda/runtime/AbstractLambdaPollLoop.java
index 347f0b3d4c8452..3cf3c69583493c 100644
--- a/extensions/amazon-lambda/common-runtime/src/main/java/io/quarkus/amazon/lambda/runtime/AbstractLambdaPollLoop.java
+++ b/extensions/amazon-lambda/common-runtime/src/main/java/io/quarkus/amazon/lambda/runtime/AbstractLambdaPollLoop.java
@@ -74,8 +74,10 @@ public void run() {
                                     }
                                 } else {
                                     Object input = null;
-                                    if (running.get() && getInputReader() != null) {
-                                        input = getInputReader().readValue(requestConnection.getInputStream());
+                                    if (running.get()) {
+                                        ObjectReader inputReader = getInputReader();
+                                        if (inputReader != null)
+                                            input = inputReader.readValue(requestConnection.getInputStream());
                                         Object output = processRequest(input, createContext(requestConnection));
                                         postResponse(url, output);
                                     }
diff --git a/integration-tests/funqy-amazon-lambda/src/main/java/io/quarkus/funqy/test/NoArgFun.java b/integration-tests/funqy-amazon-lambda/src/main/java/io/quarkus/funqy/test/NoArgFun.java
new file mode 100644
index 00000000000000..d5b24028299046
--- /dev/null
+++ b/integration-tests/funqy-amazon-lambda/src/main/java/io/quarkus/funqy/test/NoArgFun.java
@@ -0,0 +1,10 @@
+package io.quarkus.funqy.test;
+
+import io.quarkus.funqy.Funq;
+
+public class NoArgFun {
+    @Funq
+    public String noArgFun() {
+        return "noArgFun";
+    }
+}
diff --git a/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/NoArgFunTest.java b/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/NoArgFunTest.java
new file mode 100644
index 00000000000000..1fb94529c86a88
--- /dev/null
+++ b/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/NoArgFunTest.java
@@ -0,0 +1,19 @@
+package io.quarkus.funqy.test;
+
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import io.quarkus.amazon.lambda.test.LambdaClient;
+import io.quarkus.test.junit.QuarkusTest;
+
+@QuarkusTest
+@ExtendWith(UseNoArgFunExtension.class)
+public class NoArgFunTest {
+
+    @Test
+    public void testNoArgFun() throws Exception {
+        LambdaClient.invoke(String.class, null, Duration.ofSeconds(5));
+    }
+}
diff --git a/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/UseNoArgFunExtension.java b/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/UseNoArgFunExtension.java
new file mode 100644
index 00000000000000..b5a608fb332062
--- /dev/null
+++ b/integration-tests/funqy-amazon-lambda/src/test/java/io/quarkus/funqy/test/UseNoArgFunExtension.java
@@ -0,0 +1,9 @@
+package io.quarkus.funqy.test;
+
+import org.junit.jupiter.api.extension.Extension;
+
+public class UseNoArgFunExtension implements Extension {
+    static {
+        System.setProperty("quarkus.funqy.export", "noArgFun");
+    }
+}
diff --git a/test-framework/amazon-lambda/src/main/java/io/quarkus/amazon/lambda/test/LambdaClient.java b/test-framework/amazon-lambda/src/main/java/io/quarkus/amazon/lambda/test/LambdaClient.java
index 37439a471680c7..60dde79e35a877 100644
--- a/test-framework/amazon-lambda/src/main/java/io/quarkus/amazon/lambda/test/LambdaClient.java
+++ b/test-framework/amazon-lambda/src/main/java/io/quarkus/amazon/lambda/test/LambdaClient.java
@@ -2,13 +2,13 @@
 
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.time.Duration;
+import java.util.AbstractMap;
 import java.util.Map;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import io.quarkus.arc.Arc;
@@ -92,44 +92,47 @@ public String setValue(String value) {
     }
 
     public static <T> T invoke(Class<T> returnType, Object input) {
+        return invoke(returnType, input, Duration.ofNanos(Long.MAX_VALUE));
+    }
+
+    public static <T> T invoke(Class<T> returnType, Object input, Duration timeout) {
+        try {
+            return invokeAsync(returnType, input).get(timeout.toMillis(), TimeUnit.MILLISECONDS);
+        } catch (ExecutionException e) {
+            Throwable ex = e.getCause();
+            if (ex instanceof RuntimeException) {
+                throw (RuntimeException) ex;
+            }
+            throw new RuntimeException(ex);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static <T> CompletableFuture<T> invokeAsync(Class<T> returnType, Object input) {
         if (problem != null) {
-            throw new RuntimeException(problem);
+            CompletableFuture<T> failed = new CompletableFuture<>();
+            failed.completeExceptionally(problem);
+            return failed;
         }
+        final ObjectMapper mapper = getObjectMapper();
+        final String id = "aws-request-" + REQUEST_ID_GENERATOR.incrementAndGet();
+        final String requestBody;
+        final CompletableFuture<String> result = new CompletableFuture<>();
+        REQUESTS.put(id, result);
         try {
-            final ObjectMapper mapper = getObjectMapper();
-            String id = "aws-request-" + REQUEST_ID_GENERATOR.incrementAndGet();
-            CompletableFuture<String> result = new CompletableFuture<>();
-            REQUESTS.put(id, result);
-            String requestBody = mapper.writeValueAsString(input);
-            REQUEST_QUEUE.add(new Map.Entry<String, String>() {
-
-                @Override
-                public String getKey() {
-                    return id;
-                }
-
-                @Override
-                public String getValue() {
-                    return requestBody;
-                }
-
-                @Override
-                public String setValue(String value) {
-                    return null;
-                }
-            });
-            String output = result.get();
-            return mapper.readerFor(returnType).readValue(output);
-        } catch (Exception e) {
-            if (e instanceof ExecutionException) {
-                Throwable ex = e.getCause();
-                if (ex instanceof RuntimeException) {
-                    throw (RuntimeException) ex;
-                }
-                throw new RuntimeException(ex);
-            }
+            requestBody = mapper.writeValueAsString(input);
+        } catch (JsonProcessingException e) {
             throw new RuntimeException(e);
         }
+        REQUEST_QUEUE.add(new AbstractMap.SimpleImmutableEntry(id, requestBody));
+        return result.thenApply(s -> {
+            try {
+                return mapper.readerFor(returnType).readValue(s);
+            } catch (JsonProcessingException e) {
+                throw new RuntimeException(e);
+            }
+        });
     }
 
     private static ObjectMapper getObjectMapper() {