diff --git a/spec/codecs/json_lines_spec.rb b/spec/codecs/json_lines_spec.rb
index 7fc9ff5..3a87e06 100644
--- a/spec/codecs/json_lines_spec.rb
+++ b/spec/codecs/json_lines_spec.rb
@@ -131,7 +131,7 @@
       it "should raise an error if the max bytes are exceeded" do
         expect {
           subject.decode(maximum_payload << "z")
-        }.to raise_error(java.lang.IllegalStateException, "input buffer full")
+        }.to raise_error(java.lang.IllegalStateException, /input buffer full/)
       end
     end