diff --git a/lib/rule-tester/rule-tester.js b/lib/rule-tester/rule-tester.js
index 1c1737152c1..77df1def893 100644
--- a/lib/rule-tester/rule-tester.js
+++ b/lib/rule-tester/rule-tester.js
@@ -563,7 +563,12 @@ class RuleTester {
                 output = SourceCodeFixer.applyFixes(code, messages).output;
                 const errorMessageInFix = linter.verify(output, config, filename).find(m => m.fatal);
 
-                assert(!errorMessageInFix, `A fatal parsing error occurred in autofix: ${errorMessageInFix && errorMessageInFix.message}`);
+                assert(!errorMessageInFix, [
+                    "A fatal parsing error occurred in autofix.",
+                    `Error: ${errorMessageInFix && errorMessageInFix.message}`,
+                    "Autofix output:",
+                    output
+                ].join("\n"));
             } else {
                 output = code;
             }
diff --git a/tests/lib/rule-tester/rule-tester.js b/tests/lib/rule-tester/rule-tester.js
index 65a06da85d9..fedc237d64c 100644
--- a/tests/lib/rule-tester/rule-tester.js
+++ b/tests/lib/rule-tester/rule-tester.js
@@ -1829,7 +1829,7 @@ describe("RuleTester", () => {
                     invalid: []
                 }
             );
-        }, /A fatal parsing error occurred in autofix/u);
+        }, /A fatal parsing error occurred in autofix.\nError: .+\nAutofix output:\n.+/u);
     });
 
     describe("sanitize test cases", () => {