diff --git a/examples/demo-empty-project/proj.json b/examples/demo-empty-project/proj.json
index 2eac429f..8a7e8095 100644
--- a/examples/demo-empty-project/proj.json
+++ b/examples/demo-empty-project/proj.json
@@ -1,6 +1,6 @@
 {
     "project_name": "demo-empty-project",
     "project_path": "/Users/debugtalk/MyProjects/HttpRunner-dev/httprunner/examples/demo-empty-project",
-    "create_time": "2022-05-29T00:38:43.685282+08:00",
+    "create_time": "2022-05-29T11:29:24.797507+08:00",
     "hrp_version": "v4.1.0"
 }
\ No newline at end of file
diff --git a/examples/demo-with-go-plugin/proj.json b/examples/demo-with-go-plugin/proj.json
index b5665891..a707307e 100644
--- a/examples/demo-with-go-plugin/proj.json
+++ b/examples/demo-with-go-plugin/proj.json
@@ -1,6 +1,6 @@
 {
     "project_name": "demo-with-go-plugin",
     "project_path": "/Users/debugtalk/MyProjects/HttpRunner-dev/httprunner/examples/demo-with-go-plugin",
-    "create_time": "2022-05-29T00:38:42.384694+08:00",
+    "create_time": "2022-05-29T11:29:23.237043+08:00",
     "hrp_version": "v4.1.0"
 }
\ No newline at end of file
diff --git a/examples/demo-with-py-plugin/proj.json b/examples/demo-with-py-plugin/proj.json
index 8dba7a24..3a8afa50 100644
--- a/examples/demo-with-py-plugin/proj.json
+++ b/examples/demo-with-py-plugin/proj.json
@@ -1,6 +1,6 @@
 {
     "project_name": "demo-with-py-plugin",
     "project_path": "/Users/debugtalk/MyProjects/HttpRunner-dev/httprunner/examples/demo-with-py-plugin",
-    "create_time": "2022-05-29T00:38:42.523325+08:00",
+    "create_time": "2022-05-29T11:29:23.370656+08:00",
     "hrp_version": "v4.1.0"
 }
\ No newline at end of file
diff --git a/examples/demo-without-plugin/proj.json b/examples/demo-without-plugin/proj.json
index 6aafc4c4..8e3725e4 100644
--- a/examples/demo-without-plugin/proj.json
+++ b/examples/demo-without-plugin/proj.json
@@ -1,6 +1,6 @@
 {
     "project_name": "demo-without-plugin",
     "project_path": "/Users/debugtalk/MyProjects/HttpRunner-dev/httprunner/examples/demo-without-plugin",
-    "create_time": "2022-05-29T00:38:43.556711+08:00",
+    "create_time": "2022-05-29T11:29:24.659348+08:00",
     "hrp_version": "v4.1.0"
 }
\ No newline at end of file
diff --git a/hrp/boomer_test.go b/hrp/boomer_test.go
index 4edefa38..547a4618 100644
--- a/hrp/boomer_test.go
+++ b/hrp/boomer_test.go
@@ -25,10 +25,10 @@ func TestBoomerStandaloneRun(t *testing.T) {
 			NewStep("TestCase3").CallRefCase(&TestCase{Config: NewConfig("TestCase3")}),
 		},
 	}
-	testcase2 := &demoTestCaseWithPluginJSONPath
+	testcase2 := TestCasePath(demoTestCaseWithPluginJSONPath)
 
 	b := NewBoomer(2, 1)
-	go b.Run(testcase1, testcase2)
+	go b.Run(testcase1, &testcase2)
 	time.Sleep(5 * time.Second)
 	b.Quit()
 }
diff --git a/hrp/internal/build/main.go b/hrp/build.go
similarity index 90%
rename from hrp/internal/build/main.go
rename to hrp/build.go
index 45d1912e..65eded8d 100644
--- a/hrp/internal/build/main.go
+++ b/hrp/build.go
@@ -1,4 +1,4 @@
-package build
+package hrp
 
 import (
 	"bufio"
@@ -30,15 +30,10 @@ const (
 	regexGoFunctionContent  = `func [\s\S]*?\n}`
 )
 
-const (
-	genDebugTalkGo = "debugtalk_gen.go"
-	genDebugTalkPy = ".debugtalk_gen.py"
-)
-
-//go:embed templates/debugtalkPythonTemplate
+//go:embed internal/scaffold/templates/build/debugtalkPythonTemplate
 var pyTemplate string
 
-//go:embed templates/debugtalkGoTemplate
+//go:embed internal/scaffold/templates/build/debugtalkGoTemplate
 var goTemplate string
 
 type TemplateContent struct {
@@ -209,7 +204,7 @@ func buildGo(path string, output string) error {
 	}
 
 	// generate debugtalk.go in pluginDir
-	err = templateContent.genDebugTalk(filepath.Join(pluginDir, genDebugTalkGo), goTemplate)
+	err = templateContent.genDebugTalk(filepath.Join(pluginDir, PluginGoSourceGenFile), goTemplate)
 	if err != nil {
 		return err
 	}
@@ -232,9 +227,9 @@ func buildGo(path string, output string) error {
 
 	if output == "" {
 		dir, _ := os.Getwd()
-		output = filepath.Join(dir, "debugtalk.bin")
+		output = filepath.Join(dir, PluginHashicorpGoBuiltFile)
 	} else if builtin.IsFolderPathExists(output) {
-		output = filepath.Join(output, "debugtalk.bin")
+		output = filepath.Join(output, PluginHashicorpGoBuiltFile)
 	}
 	outputPath, err := filepath.Abs(output)
 	if err != nil {
@@ -242,7 +237,7 @@ func buildGo(path string, output string) error {
 	}
 
 	// build plugin debugtalk.bin
-	cmd := exec.Command("go", "build", "-o", outputPath, genDebugTalkGo, filepath.Base(path))
+	cmd := exec.Command("go", "build", "-o", outputPath, PluginGoSourceGenFile, filepath.Base(path))
 	if err := builtin.ExecCommandInDir(cmd, pluginDir); err != nil {
 		return err
 	}
@@ -267,9 +262,9 @@ func buildPy(path string, output string) error {
 	// generate debugtalk.py
 	if output == "" {
 		dir, _ := os.Getwd()
-		output = filepath.Join(dir, genDebugTalkPy)
+		output = filepath.Join(dir, PluginPySourceGenFile)
 	} else if builtin.IsFolderPathExists(output) {
-		output = filepath.Join(output, genDebugTalkPy)
+		output = filepath.Join(output, PluginPySourceGenFile)
 	}
 	err = templateContent.genDebugTalk(output, pyTemplate)
 	if err != nil {
@@ -285,18 +280,18 @@ func buildPy(path string, output string) error {
 	return nil
 }
 
-func Run(arg string, output string) (err error) {
-	ext := filepath.Ext(arg)
+func BuildPlugin(path string, output string) (err error) {
+	ext := filepath.Ext(path)
 	switch ext {
 	case ".py":
-		err = buildPy(arg, output)
+		err = buildPy(path, output)
 	case ".go":
-		err = buildGo(arg, output)
+		err = buildGo(path, output)
 	default:
 		return errors.New("type error, expected .py or .go")
 	}
 	if err != nil {
-		log.Error().Err(err).Str("arg", arg).Msg("build plugin failed")
+		log.Error().Err(err).Str("arg", path).Msg("build plugin failed")
 		os.Exit(1)
 	}
 	return nil
diff --git a/hrp/internal/build/main_test.go b/hrp/build_test.go
similarity index 73%
rename from hrp/internal/build/main_test.go
rename to hrp/build_test.go
index b05fd53e..c527b4ee 100644
--- a/hrp/internal/build/main_test.go
+++ b/hrp/build_test.go
@@ -1,6 +1,7 @@
-package build
+package hrp
 
 import (
+	"path/filepath"
 	"regexp"
 	"testing"
 
@@ -10,13 +11,13 @@ import (
 )
 
 func TestRun(t *testing.T) {
-	err := Run("../scaffold/templates/plugin/debugtalk.go", "./debugtalk.bin")
+	err := BuildPlugin(tmpl("plugin/debugtalk.go"), "./debugtalk.bin")
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
 
-	genDebugTalkPyPath := "../scaffold/templates/plugin/" + genDebugTalkPy
-	err = Run("../scaffold/templates/plugin/debugtalk.py", genDebugTalkPyPath)
+	genDebugTalkPyPath := filepath.Join(tmpl("plugin/"), PluginPySourceGenFile)
+	err = BuildPlugin(tmpl("plugin/debugtalk.py"), genDebugTalkPyPath)
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
diff --git a/hrp/cmd/build.go b/hrp/cmd/build.go
index da174bbc..3c8848e3 100644
--- a/hrp/cmd/build.go
+++ b/hrp/cmd/build.go
@@ -3,7 +3,7 @@ package cmd
 import (
 	"github.com/spf13/cobra"
 
-	"github.com/httprunner/httprunner/v4/hrp/internal/build"
+	"github.com/httprunner/httprunner/v4/hrp"
 )
 
 var buildCmd = &cobra.Command{
@@ -17,7 +17,7 @@ var buildCmd = &cobra.Command{
 		setLogLevel(logLevel)
 	},
 	RunE: func(cmd *cobra.Command, args []string) error {
-		return build.Run(args[0], output)
+		return hrp.BuildPlugin(args[0], output)
 	},
 }
 
diff --git a/hrp/internal/scaffold/main.go b/hrp/internal/scaffold/main.go
index 501cc2ef..941ab14c 100644
--- a/hrp/internal/scaffold/main.go
+++ b/hrp/internal/scaffold/main.go
@@ -11,6 +11,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/rs/zerolog/log"
 
+	"github.com/httprunner/httprunner/v4/hrp"
 	"github.com/httprunner/httprunner/v4/hrp/internal/builtin"
 	"github.com/httprunner/httprunner/v4/hrp/internal/sdk"
 	"github.com/httprunner/httprunner/v4/hrp/internal/version"
@@ -193,7 +194,7 @@ func createGoPlugin(projectName string) error {
 		return err
 	}
 	err := CopyFile("templates/plugin/debugtalk.go",
-		filepath.Join(projectName, "plugin", "debugtalk.go"))
+		filepath.Join(projectName, "plugin", hrp.PluginGoSourceFile))
 	if err != nil {
 		return errors.Wrap(err, "copy debugtalk.go failed")
 	}
@@ -205,7 +206,7 @@ func createPythonPlugin(projectName string) error {
 	log.Info().Msg("start to create hashicorp python plugin")
 
 	// create debugtalk.py
-	pluginFile := filepath.Join(projectName, "debugtalk.py")
+	pluginFile := filepath.Join(projectName, hrp.PluginPySourceFile)
 	err := CopyFile("templates/plugin/debugtalk.py", pluginFile)
 	if err != nil {
 		return errors.Wrap(err, "copy file failed")
diff --git a/hrp/internal/scaffold/templates/.debugtalk_gen.py b/hrp/internal/scaffold/templates/.debugtalk_gen.py
deleted file mode 100644
index 1bc989f2..00000000
--- a/hrp/internal/scaffold/templates/.debugtalk_gen.py
+++ /dev/null
@@ -1,75 +0,0 @@
-# NOTE: Generated By hrp v4.1.0, DO NOT EDIT!
-
-import logging
-import time
-import funppy
-
-from typing import List
-
-
-def get_user_agent():
-    return "hrp/funppy"
-
-
-def sleep(n_secs):
-    time.sleep(n_secs)
-
-
-def sum(*args):
-    result = 0
-    for arg in args:
-        result += arg
-    return result
-
-
-def sum_ints(*args: List[int]) -> int:
-    result = 0
-    for arg in args:
-        result += arg
-    return result
-
-
-def sum_two_int(a: int, b: int) -> int:
-    return a + b
-
-
-def sum_two_string(a: str, b: str) -> str:
-    return a + b
-
-
-def sum_strings(*args: List[str]) -> str:
-    result = ""
-    for arg in args:
-        result += arg
-    return result
-
-
-def concatenate(*args: List[str]) -> str:
-    result = ""
-    for arg in args:
-        result += str(arg)
-    return result
-
-
-def setup_hook_example(name):
-    logging.warning("setup_hook_example")
-    return f"setup_hook_example: {name}"
-
-
-def teardown_hook_example(name):
-    logging.warning("teardown_hook_example")
-    return f"teardown_hook_example: {name}"
-
-
-if __name__ == "__main__":
-    funppy.register("get_user_agent", get_user_agent)
-    funppy.register("sleep", sleep)
-    funppy.register("sum", sum)
-    funppy.register("sum_ints", sum_ints)
-    funppy.register("sum_two_int", sum_two_int)
-    funppy.register("sum_two_string", sum_two_string)
-    funppy.register("sum_strings", sum_strings)
-    funppy.register("concatenate", concatenate)
-    funppy.register("setup_hook_example", setup_hook_example)
-    funppy.register("teardown_hook_example", teardown_hook_example)
-    funppy.serve()
diff --git a/hrp/internal/build/templates/debugtalkGoTemplate b/hrp/internal/scaffold/templates/build/debugtalkGoTemplate
similarity index 100%
rename from hrp/internal/build/templates/debugtalkGoTemplate
rename to hrp/internal/scaffold/templates/build/debugtalkGoTemplate
diff --git a/hrp/internal/build/templates/debugtalkPythonTemplate b/hrp/internal/scaffold/templates/build/debugtalkPythonTemplate
similarity index 100%
rename from hrp/internal/build/templates/debugtalkPythonTemplate
rename to hrp/internal/scaffold/templates/build/debugtalkPythonTemplate
diff --git a/hrp/internal/scaffold/templates/debugtalk.py b/hrp/internal/scaffold/templates/debugtalk.py
deleted file mode 100644
index ea48ff48..00000000
--- a/hrp/internal/scaffold/templates/debugtalk.py
+++ /dev/null
@@ -1,57 +0,0 @@
-import logging
-import time
-from typing import List
-
-
-def get_user_agent():
-    return "hrp/funppy"
-
-
-def sleep(n_secs):
-    time.sleep(n_secs)
-
-
-def sum(*args):
-    result = 0
-    for arg in args:
-        result += arg
-    return result
-
-
-def sum_ints(*args: List[int]) -> int:
-    result = 0
-    for arg in args:
-        result += arg
-    return result
-
-
-def sum_two_int(a: int, b: int) -> int:
-    return a + b
-
-
-def sum_two_string(a: str, b: str) -> str:
-    return a + b
-
-
-def sum_strings(*args: List[str]) -> str:
-    result = ""
-    for arg in args:
-        result += arg
-    return result
-
-
-def concatenate(*args: List[str]) -> str:
-    result = ""
-    for arg in args:
-        result += str(arg)
-    return result
-
-
-def setup_hook_example(name):
-    logging.warning("setup_hook_example")
-    return f"setup_hook_example: {name}"
-
-
-def teardown_hook_example(name):
-    logging.warning("teardown_hook_example")
-    return f"teardown_hook_example: {name}"
diff --git a/hrp/plugin.go b/hrp/plugin.go
index 7d00540c..facb09ef 100644
--- a/hrp/plugin.go
+++ b/hrp/plugin.go
@@ -10,18 +10,20 @@ import (
 	"github.com/httprunner/funplugin"
 	"github.com/rs/zerolog/log"
 
-	"github.com/httprunner/httprunner/v4/hrp/internal/build"
 	"github.com/httprunner/httprunner/v4/hrp/internal/sdk"
 )
 
 const (
-	goPluginFile          = "debugtalk.so"      // built from go plugin
-	hashicorpGoPluginFile = "debugtalk.bin"     // built from hashicorp go plugin
-	hashicorpPyPluginFile = ".debugtalk_gen.py" // used for hashicorp python plugin, automatically generated by HRP
-	debugtalkPyFile       = "debugtalk.py"      // write by user
-	projectInfoFile       = "proj.json"         // used for ensuring root project
+	PluginGoBuiltFile          = "debugtalk.so"      // built from go official plugin
+	PluginHashicorpGoBuiltFile = "debugtalk.bin"     // built from hashicorp go plugin
+	PluginGoSourceFile         = "debugtalk.go"      // golang function plugin source file
+	PluginGoSourceGenFile      = "debugtalk_gen.go"  // generated for hashicorp go plugin
+	PluginPySourceFile         = "debugtalk.py"      // python function plugin source file
+	PluginPySourceGenFile      = ".debugtalk_gen.py" // generated for hashicorp python plugin
 )
 
+const projectInfoFile = "proj.json" // used for ensuring root project
+
 func initPlugin(path string, logOn bool) (plugin funplugin.IPlugin, err error) {
 	// plugin file not found
 	if path == "" {
@@ -64,16 +66,16 @@ func initPlugin(path string, logOn bool) (plugin funplugin.IPlugin, err error) {
 func locatePlugin(path string) (pluginPath string, err error) {
 	// priority: hashicorp plugin (debugtalk.bin > debugtalk.py) > go plugin (debugtalk.so)
 
-	pluginPath, err = locateFile(path, hashicorpGoPluginFile)
+	pluginPath, err = locateFile(path, PluginHashicorpGoBuiltFile)
 	if err == nil {
 		return
 	}
 
-	pluginPath, err = locateFile(path, debugtalkPyFile)
+	pluginPath, err = locateFile(path, PluginPySourceFile)
 	if err == nil {
 		// register funppy plugin
-		genPyPluginPath := filepath.Join(filepath.Dir(pluginPath), hashicorpPyPluginFile)
-		err = build.Run(pluginPath, genPyPluginPath)
+		genPyPluginPath := filepath.Join(filepath.Dir(pluginPath), PluginPySourceGenFile)
+		err = BuildPlugin(pluginPath, genPyPluginPath)
 		if err != nil {
 			log.Error().Err(err).Str("path", pluginPath).Msg("build plugin failed")
 			return
@@ -81,7 +83,7 @@ func locatePlugin(path string) (pluginPath string, err error) {
 		return genPyPluginPath, nil
 	}
 
-	pluginPath, err = locateFile(path, goPluginFile)
+	pluginPath, err = locateFile(path, PluginGoBuiltFile)
 	if err == nil {
 		return
 	}
diff --git a/hrp/plugin_test.go b/hrp/plugin_test.go
index 26e74213..27cbaa77 100644
--- a/hrp/plugin_test.go
+++ b/hrp/plugin_test.go
@@ -8,36 +8,36 @@ import (
 
 func TestLocateFile(t *testing.T) {
 	// specify target file path
-	_, err := locateFile(templatesDir+"plugin/debugtalk.go", "debugtalk.go")
+	_, err := locateFile(tmpl("plugin/debugtalk.go"), PluginGoSourceFile)
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
 
 	// specify path with the same dir
-	_, err = locateFile(templatesDir+"plugin/debugtalk.py", "debugtalk.go")
+	_, err = locateFile(tmpl("plugin/debugtalk.py"), PluginGoSourceFile)
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
 
 	// specify target file path dir
-	_, err = locateFile(templatesDir+"plugin/", "debugtalk.go")
+	_, err = locateFile(tmpl("plugin/"), PluginGoSourceFile)
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
 
 	// specify wrong path
-	_, err = locateFile(".", "debugtalk.go")
+	_, err = locateFile(".", PluginGoSourceFile)
 	if !assert.Error(t, err) {
 		t.Fatal()
 	}
-	_, err = locateFile("/abc", "debugtalk.go")
+	_, err = locateFile("/abc", PluginGoSourceFile)
 	if !assert.Error(t, err) {
 		t.Fatal()
 	}
 }
 
 func TestLocatePythonPlugin(t *testing.T) {
-	_, err := locatePlugin(templatesDir + "plugin/debugtalk.py")
+	_, err := locatePlugin(tmpl("plugin/debugtalk.py"))
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
@@ -47,7 +47,7 @@ func TestLocateGoPlugin(t *testing.T) {
 	buildHashicorpGoPlugin()
 	defer removeHashicorpGoPlugin()
 
-	_, err := locatePlugin(templatesDir + "debugtalk.bin")
+	_, err := locatePlugin(tmpl("debugtalk.bin"))
 	if !assert.Nil(t, err) {
 		t.Fatal()
 	}
diff --git a/hrp/runner.go b/hrp/runner.go
index 66bc6a9b..8290b1bf 100644
--- a/hrp/runner.go
+++ b/hrp/runner.go
@@ -166,6 +166,7 @@ func (r *HRPRunner) Run(testcases ...ITestCase) error {
 		return err
 	}
 
+	var runErr error
 	// run testcase one by one
 	for _, testcase := range testCases {
 		sessionRunner, err := r.NewSessionRunner(testcase)
@@ -185,6 +186,7 @@ func (r *HRPRunner) Run(testcases ...ITestCase) error {
 			s.appendCaseSummary(caseSummary)
 			if err != nil {
 				log.Error().Err(err).Msg("[Run] run testcase failed")
+				runErr = err
 				break
 			}
 		}
@@ -206,7 +208,8 @@ func (r *HRPRunner) Run(testcases ...ITestCase) error {
 			return err
 		}
 	}
-	return nil
+
+	return runErr
 }
 
 // NewSessionRunner creates a new session runner for testcase.
@@ -236,8 +239,10 @@ func (r *HRPRunner) newCaseRunner(testcase *TestCase) (*testCaseRunner, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "init plugin failed")
 	}
-	runner.parser.plugin = plugin
-	runner.rootDir = filepath.Dir(plugin.Path())
+	if plugin != nil {
+		runner.parser.plugin = plugin
+		runner.rootDir = filepath.Dir(plugin.Path())
+	}
 
 	// parse testcase config
 	if err := runner.parseConfig(); err != nil {
diff --git a/hrp/runner_test.go b/hrp/runner_test.go
index 7437c8bc..9c169bc1 100644
--- a/hrp/runner_test.go
+++ b/hrp/runner_test.go
@@ -1,20 +1,18 @@
 package hrp
 
 import (
+	"io/ioutil"
 	"os"
 	"testing"
 	"time"
 
 	"github.com/rs/zerolog/log"
 	"github.com/stretchr/testify/assert"
-
-	"github.com/httprunner/httprunner/v4/hrp/internal/build"
-	"github.com/httprunner/httprunner/v4/hrp/internal/scaffold"
 )
 
 func buildHashicorpGoPlugin() {
 	log.Info().Msg("[init] build hashicorp go plugin")
-	err := build.Run(templatesDir+"plugin/debugtalk.go", templatesDir+"debugtalk.bin")
+	err := BuildPlugin(tmpl("plugin/debugtalk.go"), tmpl("debugtalk.bin"))
 	if err != nil {
 		log.Error().Err(err).Msg("build hashicorp go plugin failed")
 		os.Exit(1)
@@ -23,15 +21,15 @@ func buildHashicorpGoPlugin() {
 
 func removeHashicorpGoPlugin() {
 	log.Info().Msg("[teardown] remove hashicorp go plugin")
-	os.Remove(templatesDir + "debugtalk.bin")
+	os.Remove(tmpl("debugtalk.bin"))
 }
 
 func buildHashicorpPyPlugin() {
 	log.Info().Msg("[init] prepare hashicorp python plugin")
-	pluginFile := templatesDir + "debugtalk.py"
-	err := scaffold.CopyFile("templates/plugin/debugtalk.py", pluginFile)
+	src, _ := ioutil.ReadFile(tmpl("plugin/debugtalk.py"))
+	err := ioutil.WriteFile(tmpl("debugtalk.py"), src, 0o644)
 	if err != nil {
-		log.Error().Err(err).Msg("build hashicorp python plugin failed")
+		log.Error().Err(err).Msg("copy hashicorp python plugin failed")
 		os.Exit(1)
 	}
 }
@@ -39,7 +37,8 @@ func buildHashicorpPyPlugin() {
 func removeHashicorpPyPlugin() {
 	log.Info().Msg("[teardown] remove hashicorp python plugin")
 	// on v4.1^, running case will generate .debugtalk_gen.py used by python plugin
-	os.Remove(templatesDir + hashicorpPyPluginFile)
+	os.Remove(tmpl(PluginPySourceFile))
+	os.Remove(tmpl(PluginPySourceGenFile))
 }
 
 func TestRunCaseWithGoPlugin(t *testing.T) {
@@ -57,6 +56,7 @@ func TestRunCaseWithPythonPlugin(t *testing.T) {
 }
 
 func assertRunTestCases(t *testing.T) {
+	refCase := TestCasePath(demoTestCaseWithPluginJSONPath)
 	testcase1 := &TestCase{
 		Config: NewConfig("TestCase1").
 			SetBaseURL("http://httpbin.org"),
@@ -83,7 +83,7 @@ func assertRunTestCases(t *testing.T) {
 					},
 				},
 			),
-			NewStep("testcase1-step4").CallRefCase(&demoTestCaseWithPluginJSONPath),
+			NewStep("testcase1-step4").CallRefCase(&refCase),
 		},
 	}
 	testcase2 := &TestCase{
@@ -160,7 +160,8 @@ func TestRunCaseWithPluginJSON(t *testing.T) {
 	buildHashicorpGoPlugin()
 	defer removeHashicorpGoPlugin()
 
-	err := NewRunner(nil).Run(&demoTestCaseWithPluginJSONPath) // hrp.Run(testCase)
+	testCase := TestCasePath(demoTestCaseWithPluginJSONPath)
+	err := NewRunner(nil).Run(&testCase) // hrp.Run(testCase)
 	if err != nil {
 		t.Fatal()
 	}
@@ -170,7 +171,8 @@ func TestRunCaseWithPluginYAML(t *testing.T) {
 	buildHashicorpGoPlugin()
 	defer removeHashicorpGoPlugin()
 
-	err := NewRunner(nil).Run(&demoTestCaseWithPluginYAMLPath) // hrp.Run(testCase)
+	testCase := TestCasePath(demoTestCaseWithPluginYAMLPath)
+	err := NewRunner(nil).Run(&testCase) // hrp.Run(testCase)
 	if err != nil {
 		t.Fatal()
 	}
@@ -180,16 +182,18 @@ func TestRunCaseWithRefAPI(t *testing.T) {
 	buildHashicorpGoPlugin()
 	defer removeHashicorpGoPlugin()
 
-	err := NewRunner(nil).Run(&demoTestCaseWithRefAPIPath)
+	testCase := TestCasePath(demoTestCaseWithRefAPIPath)
+	err := NewRunner(nil).Run(&testCase)
 	if err != nil {
 		t.Fatal()
 	}
 
+	refAPI := APIPath(demoAPIGETPath)
 	testcase := &TestCase{
 		Config: NewConfig("TestCase").
 			SetBaseURL("https://postman-echo.com"),
 		TestSteps: []IStep{
-			NewStep("run referenced api").CallRefAPI(&demoAPIGETPath),
+			NewStep("run referenced api").CallRefAPI(&refAPI),
 		},
 	}
 
@@ -222,7 +226,7 @@ func TestLoadTestCases(t *testing.T) {
 	}
 
 	// load test cases from single file path
-	tc = demoTestCaseWithPluginJSONPath
+	tc = TestCasePath(demoTestCaseWithPluginJSONPath)
 	testCases, err = LoadTestCases(&tc)
 	if !assert.Nil(t, err) {
 		t.Fatal()
diff --git a/hrp/testcase_test.go b/hrp/testcase_test.go
index eb6a69ae..c55642e1 100644
--- a/hrp/testcase_test.go
+++ b/hrp/testcase_test.go
@@ -1,6 +1,7 @@
 package hrp
 
 import (
+	"path/filepath"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -9,17 +10,21 @@ import (
 )
 
 const (
-	templatesDir   = "internal/scaffold/templates/"
 	hrpExamplesDir = "../examples/hrp"
 )
 
+// tmpl returns template file path
+func tmpl(relativePath string) string {
+	return filepath.Join("internal/scaffold/templates/", relativePath)
+}
+
 var (
-	demoTestCaseWithPluginJSONPath    TestCasePath = templatesDir + "testcases/demo_with_funplugin.json"
-	demoTestCaseWithPluginYAMLPath    TestCasePath = templatesDir + "testcases/demo_with_funplugin.yaml"
-	demoTestCaseWithoutPluginJSONPath TestCasePath = templatesDir + "testcases/demo_without_funplugin.json"
-	demoTestCaseWithoutPluginYAMLPath TestCasePath = templatesDir + "testcases/demo_without_funplugin.yaml"
-	demoTestCaseWithRefAPIPath        TestCasePath = templatesDir + "testcases/demo_ref_api.json"
-	demoAPIGETPath                    APIPath      = templatesDir + "/api/get.yml"
+	demoTestCaseWithPluginJSONPath    = tmpl("testcases/demo_with_funplugin.json")
+	demoTestCaseWithPluginYAMLPath    = tmpl("testcases/demo_with_funplugin.yaml")
+	demoTestCaseWithoutPluginJSONPath = tmpl("testcases/demo_without_funplugin.json")
+	demoTestCaseWithoutPluginYAMLPath = tmpl("testcases/demo_without_funplugin.yaml")
+	demoTestCaseWithRefAPIPath        = tmpl("testcases/demo_ref_api.json")
+	demoAPIGETPath                    = tmpl("/api/get.yml")
 )
 
 var demoTestCaseWithThinkTimePath TestCasePath = hrpExamplesDir + "/think_time_test.json"
@@ -152,21 +157,21 @@ var demoTestCaseWithoutPlugin = &TestCase{
 
 func TestGenDemoTestCase(t *testing.T) {
 	tCase := demoTestCaseWithPlugin.ToTCase()
-	err := builtin.Dump2JSON(tCase, demoTestCaseWithPluginJSONPath.GetPath())
+	err := builtin.Dump2JSON(tCase, demoTestCaseWithPluginJSONPath)
 	if err != nil {
 		t.Fatal()
 	}
-	err = builtin.Dump2YAML(tCase, demoTestCaseWithPluginYAMLPath.GetPath())
+	err = builtin.Dump2YAML(tCase, demoTestCaseWithPluginYAMLPath)
 	if err != nil {
 		t.Fatal()
 	}
 
 	tCase = demoTestCaseWithoutPlugin.ToTCase()
-	err = builtin.Dump2JSON(tCase, demoTestCaseWithoutPluginJSONPath.GetPath())
+	err = builtin.Dump2JSON(tCase, demoTestCaseWithoutPluginJSONPath)
 	if err != nil {
 		t.Fatal()
 	}
-	err = builtin.Dump2YAML(tCase, demoTestCaseWithoutPluginYAMLPath.GetPath())
+	err = builtin.Dump2YAML(tCase, demoTestCaseWithoutPluginYAMLPath)
 	if err != nil {
 		t.Fatal()
 	}
@@ -175,11 +180,11 @@ func TestGenDemoTestCase(t *testing.T) {
 func TestLoadCase(t *testing.T) {
 	tcJSON := &TCase{}
 	tcYAML := &TCase{}
-	err := builtin.LoadFile(demoTestCaseWithPluginJSONPath.GetPath(), tcJSON)
+	err := builtin.LoadFile(demoTestCaseWithPluginJSONPath, tcJSON)
 	if !assert.NoError(t, err) {
 		t.Fatal()
 	}
-	err = builtin.LoadFile(demoTestCaseWithPluginYAMLPath.GetPath(), tcYAML)
+	err = builtin.LoadFile(demoTestCaseWithPluginYAMLPath, tcYAML)
 	if !assert.NoError(t, err) {
 		t.Fatal()
 	}