diff --git a/src/bir.ts b/src/bir.ts
index 6fdd826..1e6e04b 100644
--- a/src/bir.ts
+++ b/src/bir.ts
@@ -86,7 +86,7 @@ export default class Bir {
     const body = template.Zaloguj({ key: this.key })
     const response = await this.api({ body })
     const sid = unsoap(response)
-    assert(sid, new BirError('Login failed, no session found in response'))
+    assert(sid, new BirError('Login failed, no session found'))
     this.sid = sid
   }
 
diff --git a/src/extract.ts b/src/extract.ts
index d5decce..841f1dc 100644
--- a/src/extract.ts
+++ b/src/extract.ts
@@ -5,7 +5,7 @@ import { BirError } from './error.js'
 
 export function unsoap(string: string) {
   const match = /<\S+Result>(.+)<\/\S+Result>/s.exec(string)
-  assert(match?.[1], new BirError('SOAP Result empty or not found in response'))
+  assert(match?.[1], new BirError('Empty response'))
   return match[1]
 }