diff --git a/gin_test.go b/gin_test.go
index be076537..cee1f3cc 100644
--- a/gin_test.go
+++ b/gin_test.go
@@ -913,3 +913,102 @@ func TestMethodNotAllowedNoRoute(t *testing.T) {
 	assert.NotPanics(t, func() { g.ServeHTTP(resp, req) })
 	assert.Equal(t, http.StatusNotFound, resp.Code)
 }
+
+// Test the fix for https://github.com/gin-gonic/gin/pull/4415
+func TestLiteralColonWithRun(t *testing.T) {
+	SetMode(TestMode)
+	router := New()
+
+	router.GET(`/test\:action`, func(c *Context) {
+		c.JSON(http.StatusOK, H{"path": "literal_colon"})
+	})
+
+	router.updateRouteTrees()
+
+	w := httptest.NewRecorder()
+
+	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "literal_colon")
+}
+
+func TestLiteralColonWithDirectServeHTTP(t *testing.T) {
+	SetMode(TestMode)
+	router := New()
+
+	router.GET(`/test\:action`, func(c *Context) {
+		c.JSON(http.StatusOK, H{"path": "literal_colon"})
+	})
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "literal_colon")
+}
+
+func TestLiteralColonWithHandler(t *testing.T) {
+	SetMode(TestMode)
+	router := New()
+
+	router.GET(`/test\:action`, func(c *Context) {
+		c.JSON(http.StatusOK, H{"path": "literal_colon"})
+	})
+
+	handler := router.Handler()
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
+	handler.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "literal_colon")
+}
+
+func TestLiteralColonWithHTTPServer(t *testing.T) {
+	SetMode(TestMode)
+	router := New()
+
+	router.GET(`/test\:action`, func(c *Context) {
+		c.JSON(http.StatusOK, H{"path": "literal_colon"})
+	})
+
+	router.GET("/test/:param", func(c *Context) {
+		c.JSON(http.StatusOK, H{"param": c.Param("param")})
+	})
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "literal_colon")
+
+	w2 := httptest.NewRecorder()
+	req2, _ := http.NewRequest(http.MethodGet, "/test/foo", nil)
+	router.ServeHTTP(w2, req2)
+
+	assert.Equal(t, http.StatusOK, w2.Code)
+	assert.Contains(t, w2.Body.String(), "foo")
+}
+
+// Test that updateRouteTrees is called only once
+func TestUpdateRouteTreesCalledOnce(t *testing.T) {
+	SetMode(TestMode)
+	router := New()
+
+	router.GET(`/test\:action`, func(c *Context) {
+		c.String(http.StatusOK, "ok")
+	})
+
+	for range 5 {
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
+		router.ServeHTTP(w, req)
+		assert.Equal(t, http.StatusOK, w.Code)
+		assert.Equal(t, "ok", w.Body.String())
+	}
+}
diff --git a/literal_colon_test.go b/literal_colon_test.go
deleted file mode 100644
index f6cfba28..00000000
--- a/literal_colon_test.go
+++ /dev/null
@@ -1,107 +0,0 @@
-package gin
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestLiteralColonWithRun(t *testing.T) {
-	SetMode(TestMode)
-	router := New()
-
-	router.GET(`/test\:action`, func(c *Context) {
-		c.JSON(http.StatusOK, H{"path": "literal_colon"})
-	})
-
-	router.updateRouteTrees()
-
-	w := httptest.NewRecorder()
-
-	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
-	router.ServeHTTP(w, req)
-
-	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "literal_colon")
-}
-
-func TestLiteralColonWithDirectServeHTTP(t *testing.T) {
-	SetMode(TestMode)
-	router := New()
-
-	router.GET(`/test\:action`, func(c *Context) {
-		c.JSON(http.StatusOK, H{"path": "literal_colon"})
-	})
-
-	w := httptest.NewRecorder()
-	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
-	router.ServeHTTP(w, req)
-
-	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "literal_colon")
-}
-
-func TestLiteralColonWithHandler(t *testing.T) {
-	SetMode(TestMode)
-	router := New()
-
-	router.GET(`/test\:action`, func(c *Context) {
-		c.JSON(http.StatusOK, H{"path": "literal_colon"})
-	})
-
-	handler := router.Handler()
-
-	w := httptest.NewRecorder()
-	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
-	handler.ServeHTTP(w, req)
-
-	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "literal_colon")
-}
-
-func TestLiteralColonWithHTTPServer(t *testing.T) {
-	SetMode(TestMode)
-	router := New()
-
-	router.GET(`/test\:action`, func(c *Context) {
-		c.JSON(http.StatusOK, H{"path": "literal_colon"})
-	})
-
-	router.GET("/test/:param", func(c *Context) {
-		c.JSON(http.StatusOK, H{"param": c.Param("param")})
-	})
-
-	w := httptest.NewRecorder()
-	req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
-	router.ServeHTTP(w, req)
-
-	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "literal_colon")
-
-	w2 := httptest.NewRecorder()
-	req2, _ := http.NewRequest(http.MethodGet, "/test/foo", nil)
-	router.ServeHTTP(w2, req2)
-
-	assert.Equal(t, http.StatusOK, w2.Code)
-	assert.Contains(t, w2.Body.String(), "foo")
-}
-
-// Test that updateRouteTrees is called only once
-func TestUpdateRouteTreesCalledOnce(t *testing.T) {
-	SetMode(TestMode)
-	router := New()
-
-	router.GET(`/test\:action`, func(c *Context) {
-		c.String(http.StatusOK, "ok")
-	})
-
-	for range 5 {
-		w := httptest.NewRecorder()
-		req, _ := http.NewRequest(http.MethodGet, "/test:action", nil)
-		router.ServeHTTP(w, req)
-		assert.Equal(t, http.StatusOK, w.Code)
-		assert.Equal(t, "ok", w.Body.String())
-	}
-}