diff --git a/core/trace/tracespec/vars.go b/core/trace/tracespec/keys.go
similarity index 100%
rename from core/trace/tracespec/vars.go
rename to core/trace/tracespec/keys.go
diff --git a/rest/internal/context/params.go b/rest/internal/context/params.go
index b1f9ecf5..b25e0e6b 100644
--- a/rest/internal/context/params.go
+++ b/rest/internal/context/params.go
@@ -5,7 +5,7 @@ import (
 	"net/http"
 )
 
-const pathVars = "pathVars"
+var pathVars = contextKey("pathVars")
 
 func Vars(r *http.Request) map[string]string {
 	vars, ok := r.Context().Value(pathVars).(map[string]string)
@@ -19,3 +19,9 @@ func Vars(r *http.Request) map[string]string {
 func WithPathVars(r *http.Request, params map[string]string) *http.Request {
 	return r.WithContext(context.WithValue(r.Context(), pathVars, params))
 }
+
+type contextKey string
+
+func (c contextKey) String() string {
+	return "rest/internal/context context key" + string(c)
+}
diff --git a/rest/internal/log.go b/rest/internal/log.go
index 80b19355..1b4d2f7f 100644
--- a/rest/internal/log.go
+++ b/rest/internal/log.go
@@ -10,7 +10,7 @@ import (
 	"github.com/tal-tech/go-zero/rest/httpx"
 )
 
-const LogContext = "request_logs"
+var LogContext = contextKey("request_logs")
 
 type LogCollector struct {
 	Messages []string
@@ -82,3 +82,9 @@ func formatf(r *http.Request, format string, v ...interface{}) string {
 func formatWithReq(r *http.Request, v string) string {
 	return fmt.Sprintf("(%s - %s) %s", r.RequestURI, httpx.GetRemoteAddr(r), v)
 }
+
+type contextKey string
+
+func (c contextKey) String() string {
+	return "rest/internal context key " + string(c)
+}