diff --git a/lib/rspec/matchers/expecteds_for_multiple_diffs.rb b/lib/rspec/matchers/expecteds_for_multiple_diffs.rb
index 608b3a101..b286bb5ae 100644
--- a/lib/rspec/matchers/expecteds_for_multiple_diffs.rb
+++ b/lib/rspec/matchers/expecteds_for_multiple_diffs.rb
@@ -69,7 +69,12 @@ def diffs(differ, actual)
         @expected_list.map do |(expected, diff_label)|
           diff = differ.diff(actual, expected)
           next if diff.strip.empty?
-          "#{diff_label}#{diff}"
+          if diff == "\e[0m\n\e[0m"
+            "#{diff_label}\n" \
+              "  <The diff is empty, are your objects producing identical `#inspect` output?>"
+          else
+            "#{diff_label}#{diff}"
+          end
         end.compact.join("\n")
       end
     end
diff --git a/spec/rspec/matchers/expecteds_for_multiple_diffs_spec.rb b/spec/rspec/matchers/expecteds_for_multiple_diffs_spec.rb
index c351f4351..222feaf6c 100644
--- a/spec/rspec/matchers/expecteds_for_multiple_diffs_spec.rb
+++ b/spec/rspec/matchers/expecteds_for_multiple_diffs_spec.rb
@@ -60,12 +60,14 @@ def create_matcher(stubs)
       end
 
       describe "#message_with_diff" do
-        it "returns just provided message if diff is empty" do
-          allow(FakeDiffer).to receive(:diff) { "" }
+        it "returns a message warning if the diff is empty" do
+          allow(FakeDiffer).to receive(:diff) { "\e[0m\n\e[0m" }
           expect(wrapped_value.message_with_diff(
             message, differ, actual
           )).to eq(dedent <<-EOS)
             |a message
+            |Diff:
+            |  <The diff is empty, are your objects producing identical `#inspect` output?>
           EOS
         end