diff --git a/Gemfile.lock b/Gemfile.lock
index fee305e..104afbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    leopard (0.1.5)
+    leopard (0.1.6)
       concurrent-ruby (~> 1.1)
       dry-configurable (~> 1.3)
       dry-monads (~> 1.9)
diff --git a/examples/echo_endpoint.rb b/examples/echo_endpoint.rb
index 202b8ea..05e02f8 100755
--- a/examples/echo_endpoint.rb
+++ b/examples/echo_endpoint.rb
@@ -12,6 +12,7 @@ def initialize(a_var = 1)
   end
 
   endpoint(:echo) { |msg| Success(msg.data) }
+  endpoint(:echo_fail) { |msg| Failure({ failure: '*boom*', data: msg.data }.to_json) }
 end
 
 if __FILE__ == $PROGRAM_NAME
@@ -22,6 +23,6 @@ def initialize(a_var = 1)
       version: '1.0.0',
       instance_args: [2],
     },
-    instances: 4,
+    instances: 1,
   )
 end
diff --git a/lib/leopard/message_wrapper.rb b/lib/leopard/message_wrapper.rb
index 732cdad..e1638ff 100644
--- a/lib/leopard/message_wrapper.rb
+++ b/lib/leopard/message_wrapper.rb
@@ -30,11 +30,10 @@ def respond(payload)
       end
 
       # @param err [String, Exception] The error message or exception to respond with.
-      # @param code [Integer] The HTTP status code to use for the error response.
       #
       # @return [void]
-      def respond_with_error(err, code: 500)
-        raw.respond_with_error(err.to_s, code:)
+      def respond_with_error(err)
+        raw.respond_with_error(err.to_s)
       end
 
       private
diff --git a/test/lib/message_wrapper.rb b/test/lib/message_wrapper.rb
index 3ea550b..d4c85c9 100644
--- a/test/lib/message_wrapper.rb
+++ b/test/lib/message_wrapper.rb
@@ -15,8 +15,8 @@ def respond(payload)
     @responded_payload = payload
   end
 
-  def respond_with_error(err, code:)
-    @error_args = [err, code]
+  def respond_with_error(err)
+    @error_args = [err]
   end
 end
 
@@ -57,15 +57,15 @@ def respond_with_error(err, code:)
   end
 
   it 'responds with error' do
-    wrapper.respond_with_error('fail', code: 404)
+    wrapper.respond_with_error('fail')
 
-    assert_equal ['fail', 404], msg.error_args
+    assert_equal ['fail'], msg.error_args
   end
 
   it 'coerces exception objects to strings when responding with error' do
     err = StandardError.new('broken')
     wrapper.respond_with_error(err)
 
-    assert_equal ['broken', 500], msg.error_args
+    assert_equal ['broken'], msg.error_args
   end
 end