diff --git a/passerelle/apps/astech/models.py b/passerelle/apps/astech/models.py
index dadf55af..50b20f3c 100644
--- a/passerelle/apps/astech/models.py
+++ b/passerelle/apps/astech/models.py
@@ -161,7 +161,7 @@ class ASTech(BaseResource, HTTPResource):
             try:
                 content = response.json()
             except ValueError:
-                content = response.content[:1024]
+                content = '%r' % response.content[:1024]
             raise APIError(
                 'AS-TECH response: %s %s' % (response.status_code, response.reason),
                 data={
diff --git a/tests/test_astech.py b/tests/test_astech.py
index b25637de..0c86a431 100644
--- a/tests/test_astech.py
+++ b/tests/test_astech.py
@@ -136,7 +136,7 @@ def test_connections(mocked_request, app, setup):
     assert response.json['err_class'].endswith('APIError')
     assert response.json['err_desc'] == 'AS-TECH response: 500 Crashhhh'
     assert response.json['data']['error']['status'] == 500
-    assert response.json['data']['error']['content'] == 'crash'
+    assert 'crash' in response.json['data']['error']['content']
     mocked_request.return_value = tests.utils.FakedResponse(content='not json', status_code=200, reason='OK')
     response = app.get(endpoint)
     assert response.json['err'] == 1