diff --git a/packages/dsl-java/src/main/java/io/contract_testing/contractcase/client/ContractResponseStreamObserver.java b/packages/dsl-java/src/main/java/io/contract_testing/contractcase/client/ContractResponseStreamObserver.java
index d168afce7..06ae8759d 100644
--- a/packages/dsl-java/src/main/java/io/contract_testing/contractcase/client/ContractResponseStreamObserver.java
+++ b/packages/dsl-java/src/main/java/io/contract_testing/contractcase/client/ContractResponseStreamObserver.java
@@ -152,24 +152,25 @@ public void onNext(final ContractResponse coreResponse) {
           );
         }
 
-        rpcConnector.sendResponse(
-            ResultResponse.newBuilder().setResult(
-                mapResult(
-                    ConnectorResult.fromConnectorResult(
-                        configHandle.getTriggerFunction(handle)
-                            .trigger(ConnectorIncomingMapper.map(
-                                    triggerFunctionRequest.getSetup(),
-                                    (name, args) -> rpcConnector.executeCallAndWait(
-                                        rpcConnector.makeInvokeFunction(
-                                            name,
-                                            args
-                                        ), "Invoking function '" + name + "' in core")
-                                )
-                            ))
-                )
-            ).build(),
-            requestId, LogLevel.NONE
-        );
+        executor.submit(() ->
+            rpcConnector.sendResponse(
+                ResultResponse.newBuilder().setResult(
+                    mapResult(
+                        ConnectorResult.fromConnectorResult(
+                            configHandle.getTriggerFunction(handle)
+                                .trigger(ConnectorIncomingMapper.map(
+                                        triggerFunctionRequest.getSetup(),
+                                        (name, args) -> rpcConnector.executeCallAndWait(
+                                            rpcConnector.makeInvokeFunction(
+                                                name,
+                                                args
+                                            ), "Invoking function '" + name + "' in core")
+                                    )
+                                ))
+                    )
+                ).build(),
+                requestId, LogLevel.NONE
+            ));
       }
       case RESULT_RESPONSE -> {
         rpcConnector.completeWait(requestId, coreResponse.getResultResponse().getResult());
diff --git a/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionCallerExampleTest.java b/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionCallerExampleTest.java
index 1334105ad..83796465f 100644
--- a/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionCallerExampleTest.java
+++ b/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionCallerExampleTest.java
@@ -1,27 +1,23 @@
 package io.contract_testing.contractcase.test.function;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
+import static org.assertj.core.api.Assertions.assertThat;
+
 import io.contract_testing.contractcase.ContractCaseConfig;
 import io.contract_testing.contractcase.ContractDefiner;
 import io.contract_testing.contractcase.ExampleDefinition;
-import io.contract_testing.contractcase.IndividualSuccessTestConfig;
-import io.contract_testing.contractcase.InvokableFunctions;
+import io.contract_testing.contractcase.IndividualSuccessTestConfig.IndividualSuccessTestConfigBuilder;
 import io.contract_testing.contractcase.LogLevel;
 import io.contract_testing.contractcase.PublishType;
 import io.contract_testing.contractcase.definitions.matchers.AnyInteger;
 import io.contract_testing.contractcase.definitions.matchers.AnyNull;
 import io.contract_testing.contractcase.definitions.mocks.functions.FunctionExecutionExample;
-import io.contract_testing.contractcase.definitions.mocks.functions.WillReceiveFunctionCall;
+import io.contract_testing.contractcase.definitions.mocks.functions.WillCallFunction;
 import java.util.List;
-import java.util.function.Function;
-import org.jetbrains.annotations.NotNull;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.Test;
 
 public class FunctionCallerExampleTest {
 
-  static final ObjectMapper mapper = new ObjectMapper();
   private static final ContractDefiner contract = new ContractDefiner(ContractCaseConfig.ContractCaseConfigBuilder.aContractCaseConfig()
       .consumerName("Java Function Caller Example")
       .providerName("Java Function Execution Example")
@@ -34,56 +30,51 @@ static void after() {
     contract.endRecord();
   }
 
-  public class NoArgFunction {
-    public void apply() {
-    }
-  }
 
   @Test
   public void testNoArgFunction() {
-    contract.registerFunction("NoArgFunction", () -> {
-      return null;
-    });
-    contract.runExample(new ExampleDefinition<>(
-        List.of(),
-        new WillReceiveFunctionCall(FunctionExecutionExample.builder()
-            .arguments(List.of())
-            .returnValue(new AnyNull())
-            .functionName("NoArgFunction")
-            .build())
-    ));
+    contract.runExample(
+        new ExampleDefinition<>(
+            List.of(),
+            new WillCallFunction(FunctionExecutionExample.builder()
+                .arguments(List.of())
+                .returnValue(new AnyNull())
+                .functionName("NoArgFunction")
+                .build())
+        ),
+        IndividualSuccessTestConfigBuilder.<String>builder()
+            .withTrigger((setupInfo) ->
+                setupInfo.getFunction(setupInfo.getMockSetup("functionHandle"))
+                    .apply(List.of()))
+            .withTestResponse((result, setupInfo) -> {
+              assertThat(result).isEqualTo("null");
+            })
+    );
   }
 
   @Test
   public void testOneArgFunction() {
 
-    Function<Integer, String> functionUnderTest = (Integer num) -> num + " pages";
-
-    contract.registerFunction("PageNumbers", convertJsonArgs(functionUnderTest));
-    contract.runExample(new ExampleDefinition<>(
+    contract.runExample(
+        new ExampleDefinition<>(
             List.of(),
-            new WillReceiveFunctionCall(FunctionExecutionExample.builder()
+            new WillCallFunction(FunctionExecutionExample.builder()
                 .arguments(List.of(new AnyInteger(2)))
                 .returnValue("2 pages")
                 .functionName("PageNumbers")
                 .build())
         ),
-        IndividualSuccessTestConfig.IndividualSuccessTestConfigBuilder.builder()
-            .build()
+        IndividualSuccessTestConfigBuilder.<String>builder()
+            .withTrigger((setupInfo) ->
+                setupInfo.getFunction(setupInfo.getMockSetup("functionHandle"))
+                    .apply(List.of("2")))
+            .withTestResponse((result, setupInfo) -> {
+              assertThat(result).isEqualTo("\"2 pages\"");
+            })
     );
   }
 
-  @NotNull
-  private static InvokableFunctions.InvokableFunction1 convertJsonArgs(Function<Integer, String> functionUnderTest) {
-    return (String a) -> {
-      try {
-        var arg1 = mapper.readValue(a, Integer.class);
-        return mapper.writeValueAsString(mapper.writeValueAsString(functionUnderTest.apply(arg1)));
-      } catch (JsonProcessingException e) {
-        throw new RuntimeException("Unable to parse argument");
-      }
-    };
-  }
+
 
 
 }
diff --git a/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionImplementerExampleTest.java b/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionImplementerExampleTest.java
new file mode 100644
index 000000000..b9a71c8df
--- /dev/null
+++ b/packages/dsl-java/src/test/java/io/contract_testing/contractcase/test/function/FunctionImplementerExampleTest.java
@@ -0,0 +1,84 @@
+package io.contract_testing.contractcase.test.function;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.contract_testing.contractcase.ContractCaseConfig;
+import io.contract_testing.contractcase.ContractDefiner;
+import io.contract_testing.contractcase.ExampleDefinition;
+import io.contract_testing.contractcase.IndividualSuccessTestConfig;
+import io.contract_testing.contractcase.InvokableFunctions;
+import io.contract_testing.contractcase.PublishType;
+import io.contract_testing.contractcase.definitions.matchers.AnyInteger;
+import io.contract_testing.contractcase.definitions.matchers.AnyNull;
+import io.contract_testing.contractcase.definitions.mocks.functions.FunctionExecutionExample;
+import io.contract_testing.contractcase.definitions.mocks.functions.WillReceiveFunctionCall;
+import java.util.List;
+import java.util.function.Function;
+import org.jetbrains.annotations.NotNull;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Test;
+
+public class FunctionImplementerExampleTest {
+
+  static final ObjectMapper mapper = new ObjectMapper();
+  private static final ContractDefiner contract = new ContractDefiner(ContractCaseConfig.ContractCaseConfigBuilder.aContractCaseConfig()
+      .consumerName("Java Function Implementer Example")
+      .providerName("Java Function Execution Example")
+      .publish(PublishType.NEVER)
+      .contractDir("temp-contracts")
+      .build());
+
+  @AfterAll
+  static void after() {
+    contract.endRecord();
+  }
+
+
+  @Test
+  public void testNoArgFunction() {
+    contract.registerFunction("NoArgFunction", () -> {
+      return null;
+    });
+    contract.runExample(new ExampleDefinition<>(
+        List.of(),
+        new WillReceiveFunctionCall(FunctionExecutionExample.builder()
+            .arguments(List.of())
+            .returnValue(new AnyNull())
+            .functionName("NoArgFunction")
+            .build())
+    ));
+  }
+
+  @Test
+  public void testOneArgFunction() {
+
+    Function<Integer, String> functionUnderTest = (Integer num) -> num + " pages";
+
+    contract.registerFunction("PageNumbers", convertJsonArgs(functionUnderTest));
+    contract.runExample(new ExampleDefinition<>(
+            List.of(),
+            new WillReceiveFunctionCall(FunctionExecutionExample.builder()
+                .arguments(List.of(new AnyInteger(2)))
+                .returnValue("2 pages")
+                .functionName("PageNumbers")
+                .build())
+        ),
+        IndividualSuccessTestConfig.IndividualSuccessTestConfigBuilder.builder()
+            .build()
+    );
+  }
+
+  @NotNull
+  private static InvokableFunctions.InvokableFunction1 convertJsonArgs(Function<Integer, String> functionUnderTest) {
+    return (String a) -> {
+      try {
+        var arg1 = mapper.readValue(a, Integer.class);
+        return mapper.writeValueAsString(mapper.writeValueAsString(functionUnderTest.apply(arg1)));
+      } catch (JsonProcessingException e) {
+        throw new RuntimeException("Unable to parse argument");
+      }
+    };
+  }
+
+
+}