diff --git a/src/drivers/npm/driver.js b/src/drivers/npm/driver.js
index bce3bf326..08d392079 100644
--- a/src/drivers/npm/driver.js
+++ b/src/drivers/npm/driver.js
@@ -40,12 +40,6 @@ languageDetect.setLanguageType('iso2')
 
 const extensions = /^([^.]+$|\.(asp|aspx|cgi|htm|html|jsp|php)$)/
 
-const errorTypes = {
-  RESPONSE_NOT_OK: 'Response was not ok',
-  NO_RESPONSE: 'No response from server',
-  NO_HTML_DOCUMENT: 'No HTML document'
-}
-
 const { apps: technologies, categories } = JSON.parse(
   fs.readFileSync(path.resolve(`${__dirname}/apps.json`))
 )
@@ -157,7 +151,7 @@ class Site {
     try {
       this.originalUrl = new URL(url)
     } catch (error) {
-      throw new Error(error.message || error.toString())
+      throw new Error(error.toString())
     }
 
     this.analyzedUrls = {}
@@ -411,7 +405,7 @@ class Site {
 
       this.log('Page closed')
 
-      throw new Error('NO_RESPONSE')
+      throw new Error('No response from server')
     }
 
     if (!this.language) {
@@ -493,21 +487,9 @@ class Site {
         await this.batch(links.slice(0, this.options.maxUrls), depth + 1)
       }
     } catch (error) {
-      const type =
-        error.message && errorTypes[error.message]
-          ? error.message
-          : 'UNKNOWN_ERROR'
-      const message =
-        error.message && errorTypes[error.message]
-          ? errorTypes[error.message]
-          : 'Unknown error'
-
       this.analyzedUrls[url.href] = {
         status: 0,
-        error: {
-          type,
-          message
-        }
+        error: error.message || error.toString()
       }
 
       this.error(error)