diff --git a/README.md b/README.md
index 0280901..84b7d30 100644
--- a/README.md
+++ b/README.md
@@ -50,3 +50,34 @@ tasks:
       - echo "value of key3 is '$key3'"
       - echo "value of key4 is '$key4'" # assuming key4 is defined in .secrets/env
 ```
+
+## Updates with example runfile with all the features
+
+```yaml
+version: 0.0.1
+
+tasks:
+  test:
+    env:
+      key1: value1
+      key2: value2
+      key3:
+        sh: echo -n "hello"
+      key4:
+        required: true
+      dotenv:
+        - .secrets/env # load dotenv file
+    cmd:
+      - echo "value of key1 is '$key1'"
+      - echo "value of key2 is '$key2'"
+      - echo "value of key3 is '$key3'"
+      - echo "value of key4 is '$key4'" # assuming key4 is defined in .secrets/env
+  build:
+    dir: cmd/app
+    cmd:
+      - go build -o app
+  run:
+    dir: cmd/app
+    cmd:
+      - go run .
+```
diff --git a/Runfile b/Runfile
index f12eed6..1585b7d 100644
--- a/Runfile
+++ b/Runfile
@@ -19,3 +19,7 @@ tasks:
   test:
     cmd:
       - go test -json ./pkg/runfile | gotestfmt
+
+  test:only-failing:
+    cmd:
+      - go test -json ./pkg/runfile | gotestfmt --hide successful-tests
diff --git a/pkg/runfile/run.go b/pkg/runfile/run.go
index fb7994e..5c46382 100644
--- a/pkg/runfile/run.go
+++ b/pkg/runfile/run.go
@@ -151,102 +151,6 @@ func runTask(ctx Context, rf *Runfile, args runTaskArgs) *Error {
 	return nil
 }
 
-// func (rf *Runfile) runTask(ctx Context, args runTaskArgs) *Error {
-// 	runfilePath := fn.Must(filepath.Rel(rf.attrs.RootRunfilePath, rf.attrs.RunfilePath))
-//
-// 	trail := append(args.taskTrail, args.taskName)
-//
-// 	formatErr := func(err *Error) *Error {
-// 		if runfilePath != "." {
-// 			return err.WithTask(strings.Join(trail, "/")).WithRunfile(runfilePath)
-// 		}
-// 		return err.WithTask(strings.Join(trail, "/"))
-// 	}
-//
-// 	logger := ctx.With("task", args.taskName, "runfile", runfilePath)
-// 	logger.Debug("running task")
-// 	task, ok := rf.Tasks[args.taskName]
-// 	if !ok {
-// 		return formatErr(TaskNotFound)
-// 	}
-//
-// 	task.Name = args.taskName
-// 	if task.Env == nil {
-// 		task.Env = make(EnvVar)
-// 	}
-//
-// 	for k, v := range args.envOverrides {
-// 		task.Env[k] = v
-// 	}
-//
-// 	pt, err := ParseTask(ctx, rf, task)
-// 	if err != nil {
-// 		return formatErr(err)
-// 	}
-//
-// 	logger.Debug("debugging env", "pt.environ", pt.Env, "overrides", args.envOverrides)
-// 	for _, command := range pt.Commands {
-// 		logger.Debug("running command task", "command.run", command.Run, "parent.task", args.taskName)
-// 		if command.Run != "" {
-// 			if err := rf.runTask(ctx, runTaskArgs{
-// 				taskTrail:    trail,
-// 				taskName:     command.Run,
-// 				envOverrides: pt.Env,
-// 			}); err != nil {
-// 				return err
-// 				// return NewError("", "").WithTask(fmt.Sprintf("%s/%s", err.TaskName, command.Run)).WithRunfile(rf.attrs.RunfilePath).WithErr(err.WithMetadata())
-// 				// e := formatErr(err).WithTask(fmt.Sprintf("%s/%s", err.TaskName, command.Run))
-// 				// return e
-// 			}
-// 			continue
-// 		}
-//
-// 		stdoutR, stdoutW := io.Pipe()
-// 		stderrR, stderrW := io.Pipe()
-//
-// 		go func() {
-// 			r := bufio.NewReader(stdoutR)
-// 			for {
-// 				b, err := r.ReadBytes('\n')
-// 				if err != nil {
-// 					logger.Info("stdout", "msg", string(b), "err", err)
-// 					// return
-// 					break
-// 				}
-// 				fmt.Fprintf(os.Stdout, "%s %s", ctx.theme.TaskPrefixStyle.Render(fmt.Sprintf("[%s]", args.taskName)), b)
-// 			}
-// 		}()
-//
-// 		go func() {
-// 			r := bufio.NewReader(stderrR)
-// 			for {
-// 				b, err := r.ReadBytes('\n')
-// 				if err != nil {
-// 					fmt.Printf("hello err: %+v\n", err)
-// 					logger.Info("stderr", "err", err)
-// 					// return
-// 					break
-// 				}
-// 				fmt.Fprintf(os.Stderr, "%s %s", ctx.theme.TaskPrefixStyle.Render(fmt.Sprintf("[%s]", args.taskName)), b)
-// 			}
-// 		}()
-//
-// 		cmd := createCommand(ctx, cmdArgs{
-// 			shell:      pt.Shell,
-// 			env:        ToEnviron(pt.Env),
-// 			cmd:        command.Command,
-// 			workingDir: pt.WorkingDir,
-// 			stdout:     stdoutW,
-// 			stderr:     stderrW,
-// 		})
-// 		if err := cmd.Run(); err != nil {
-// 			return formatErr(CommandFailed).WithErr(err)
-// 		}
-// 	}
-//
-// 	return nil
-// }
-
 type RunArgs struct {
 	Tasks             []string
 	ExecuteInParallel bool
diff --git a/pkg/runfile/run_test.go b/pkg/runfile/run_test.go
index 00929b5..1252a44 100644
--- a/pkg/runfile/run_test.go
+++ b/pkg/runfile/run_test.go
@@ -1,13 +1,15 @@
 package runfile
 
 import (
+	"context"
+	"log/slog"
 	"reflect"
 	"testing"
+	"time"
 )
 
 func Test_runTask(t *testing.T) {
 	type args struct {
-		ctx  Context
 		rf   *Runfile
 		args runTaskArgs
 	}
@@ -16,12 +18,40 @@ func Test_runTask(t *testing.T) {
 		args args
 		want *Error
 	}{
-		// TODO: Add test cases.
+		{
+			name: "1. Task Not Found",
+			args: args{
+				rf: &Runfile{
+					Tasks: map[string]Task{},
+				},
+				args: runTaskArgs{
+					taskName: "sample",
+				},
+			},
+			want: TaskNotFound,
+		},
+
+		{
+			name: "1. Task Not Found",
+			args: args{
+				rf: &Runfile{
+					Tasks: map[string]Task{},
+				},
+				args: runTaskArgs{
+					taskName: "sample",
+				},
+			},
+			want: TaskNotFound,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := runTask(tt.args.ctx, tt.args.rf, tt.args.args); !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("runTask() = %v, want %v", got, tt.want)
+			ctx, cf := context.WithTimeout(context.TODO(), 2*time.Second)
+			defer cf()
+
+			err := runTask(NewContext(ctx, slog.Default()), tt.args.rf, tt.args.args)
+			if !reflect.DeepEqual(err, tt.want) {
+				t.Errorf("runTask() = %v, want %v", err, tt.want)
 			}
 		})
 	}
diff --git a/pkg/runfile/task-parser.go b/pkg/runfile/task-parser.go
index 682e5b8..46700cb 100644
--- a/pkg/runfile/task-parser.go
+++ b/pkg/runfile/task-parser.go
@@ -19,7 +19,6 @@ type ParsedTask struct {
 	Commands   []CommandJson     `json:"commands"`
 }
 
-// func ParseTask(ctx Context, rf *Runfile, taskName string) (*ParsedTask, error) {
 func ParseTask(ctx Context, rf *Runfile, task Task) (*ParsedTask, *Error) {
 	globalEnv := make(map[string]string)