diff --git a/lib/easy_broker/constants.rb b/lib/easy_broker/constants.rb
index 6934114..9188df9 100644
--- a/lib/easy_broker/constants.rb
+++ b/lib/easy_broker/constants.rb
@@ -8,5 +8,5 @@ module EasyBroker
   DEFAULT_API_ROOT_URL = 'https://api.easybroker.com/v1'
   STAGING_API_ROOT_URL = 'https://api.stagingeb.com/v1'
   AUTHORIZATION_HEADER = 'X-Authorization'
-  COUNTRY_CODE_HEADER = 'Country-Code'
+  COUNTRY_CODE_HEADER  = 'Country-Code'
 end
diff --git a/lib/easy_broker/errors.rb b/lib/easy_broker/errors.rb
index a7cfeb7..e31d3f5 100644
--- a/lib/easy_broker/errors.rb
+++ b/lib/easy_broker/errors.rb
@@ -10,7 +10,7 @@ def initialize(message, response)
 
   class AuthenticationError < Error
     def initialize(response)
-      super(response["error"], response)
+      super('Invalid API Key or missing configurations', response)
     end
   end
 end
diff --git a/test/api_client_test.rb b/test/api_client_test.rb
index d86e99c..f8a3139 100644
--- a/test/api_client_test.rb
+++ b/test/api_client_test.rb
@@ -21,32 +21,18 @@ def test_country_code_header
   end
 
   def test_get_without_country_code_header
-    invalid_country_error = 'You need to provide a valid country code in which your integration works'
-    exception = assert_raises EasyBroker::AuthenticationError do
-      stub_verb_request(:get, 'test').to_return(
-        status: 401,
-        body: {
-          error: invalid_country_error
-        }.to_json
-      )
+    assert_raises EasyBroker::AuthenticationError do
+      stub_verb_request(:get, 'test').to_return(status: 401)
       client.get('test')
     end
-    assert_equal invalid_country_error, exception.message
   end
 
   def test_get_without_invalid_api_key
     @client = EasyBroker::ApiClient.new
-    invalid_api_key_error = 'Your API key is invalid.'
-    exception = assert_raises EasyBroker::AuthenticationError do
-      stub_verb_request(:get, 'test').to_return(
-        status: 401,
-        body: {
-          error: invalid_api_key_error
-        }.to_json
-      )
+    assert_raises EasyBroker::AuthenticationError do
+      stub_verb_request(:get, 'test').to_return(status: 401)
       client.get('test')
     end
-    assert_equal invalid_api_key_error, exception.message
   end
 
   def test_logger