diff --git a/workflow/runtime.go b/workflow/runtime.go
index 892dc85e..7816c9b8 100644
--- a/workflow/runtime.go
+++ b/workflow/runtime.go
@@ -32,7 +32,7 @@ type Workflow func(ctx *Context) (any, error)
 type Activity func(ctx ActivityContext) (any, error)
 
 func NewRuntime(host string, port string) (*WorkflowRuntime, error) {
-	ctx, canc := context.WithTimeout(context.Background(), time.Second*10)
+	ctx, canc := context.WithTimeout(context.Background(), time.Second*10) // TODO: add timeout option
 	defer canc()
 
 	address := fmt.Sprintf("%s:%s", host, port)
@@ -44,7 +44,7 @@ func NewRuntime(host string, port string) (*WorkflowRuntime, error) {
 		grpc.WithBlock(), // TODO: config
 	)
 	if err != nil {
-		return nil, fmt.Errorf("failed to create runtime - grpc connection failed: %v", err)
+		return &WorkflowRuntime{}, fmt.Errorf("failed to create runtime - grpc connection failed: %v", err)
 	}
 
 	return &WorkflowRuntime{
@@ -64,6 +64,10 @@ func getDecorator(f interface{}) (string, error) {
 
 	funcName := callSplit[len(callSplit)-1]
 
+	if funcName == "1" {
+		return "", errors.New("anonymous function name")
+	}
+
 	return funcName, nil
 }
 
diff --git a/workflow/runtime_test.go b/workflow/runtime_test.go
index eae8a86a..2e5f9b91 100644
--- a/workflow/runtime_test.go
+++ b/workflow/runtime_test.go
@@ -1,28 +1,67 @@
 package workflow
 
 import (
+	"sync"
 	"testing"
 
+	"github.com/microsoft/durabletask-go/task"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
+func TestNewRuntime(t *testing.T) {
+	t.Run("failure to create newruntime without dapr", func(t *testing.T) {
+		wr, err := NewRuntime("localhost", "50001")
+		require.Error(t, err)
+		assert.Equal(t, &WorkflowRuntime{}, wr)
+	})
+}
+
 func TestWorkflowRuntime(t *testing.T) {
+	testRuntime := WorkflowRuntime{
+		tasks:  task.NewTaskRegistry(),
+		client: nil,
+		mutex:  sync.Mutex{},
+		quit:   nil,
+		cancel: nil,
+	}
+
 	// TODO: Mock grpc conn - currently requires dapr to be available
-	t.Run("test workflow name is correct", func(t *testing.T) {
-		wr, err := NewRuntime("localhost", "50001")
+	t.Run("register workflow", func(t *testing.T) {
+		err := testRuntime.RegisterWorkflow(testWorkflow)
 		require.NoError(t, err)
-		err = wr.RegisterWorkflow(testOrchestrator)
+	})
+	t.Run("register workflow - anonymous func", func(t *testing.T) {
+		err := testRuntime.RegisterWorkflow(func(ctx *Context) (any, error) {
+			return nil, nil
+		})
+		require.Error(t, err)
+	})
+	t.Run("register activity", func(t *testing.T) {
+		err := testRuntime.RegisterActivity(testActivity)
 		require.NoError(t, err)
 	})
+	t.Run("register activity - anonymous func", func(t *testing.T) {
+		err := testRuntime.RegisterActivity(func(ctx ActivityContext) (any, error) {
+			return nil, nil
+		})
+		require.Error(t, err)
+	})
 }
 
 func TestGetDecorator(t *testing.T) {
-	name, err := getDecorator(testOrchestrator)
+	name, err := getDecorator(testWorkflow)
 	require.NoError(t, err)
-	assert.Equal(t, "testOrchestrator", name)
+	assert.Equal(t, "testWorkflow", name)
+}
+
+func testWorkflow(ctx *Context) (any, error) {
+	_ = ctx
+	return nil, nil
 }
 
-func testOrchestrator(ctx *Context) (any, error) {
+func testActivity(ctx ActivityContext) (any, error) {
+	_ = ctx
 	return nil, nil
 }