diff --git a/spec/convert_api_spec.rb b/spec/convert_api_spec.rb
index 2b2baa0..9eb58d4 100644
--- a/spec/convert_api_spec.rb
+++ b/spec/convert_api_spec.rb
@@ -102,13 +102,14 @@
 
       it 'with invalid secret' do
         described_class.config.api_secret = 'invalid'
-        described_class.config.token = 'invalid'
+        described_class.config.token = nil
 
         expect { subject }.to raise_error(ConvertApi::ClientError)
       end
 
       it 'with invalid token' do
         described_class.config.token = 'invalid'
+        described_class.config.api_secret = nil
 
         expect { subject }.to raise_error(ConvertApi::ClientError)
       end