diff --git a/demo/markdownlint-browser.js b/demo/markdownlint-browser.js
index ce6b235b..5cec4c6e 100644
--- a/demo/markdownlint-browser.js
+++ b/demo/markdownlint-browser.js
@@ -2354,7 +2354,8 @@ function lintContent(ruleList, aliasToRuleNames, name, content, md, config, conf
     });
     // eslint-disable-next-line jsdoc/require-jsdoc
     function throwError(property) {
-      throw new Error("Property '" + property + "' of onError parameter is incorrect.");
+      throw new Error( // eslint-disable-next-line max-len
+      "Value of '".concat(property, "' passed to onError by '").concat(ruleName, "' is incorrect for '").concat(name, "'."));
     }
     // eslint-disable-next-line jsdoc/require-jsdoc
     function onError(errorInfo) {
diff --git a/lib/markdownlint.js b/lib/markdownlint.js
index 315cc9da..c01745e2 100644
--- a/lib/markdownlint.js
+++ b/lib/markdownlint.js
@@ -604,7 +604,8 @@ function lintContent(
     // eslint-disable-next-line jsdoc/require-jsdoc
     function throwError(property) {
       throw new Error(
-        "Property '" + property + "' of onError parameter is incorrect.");
+        // eslint-disable-next-line max-len
+        `Value of '${property}' passed to onError by '${ruleName}' is incorrect for '${name}'.`);
     }
     // eslint-disable-next-line jsdoc/require-jsdoc
     function onError(errorInfo) {
diff --git a/test/markdownlint-test-custom-rules.js b/test/markdownlint-test-custom-rules.js
index ab2c742f..3f3db702 100644
--- a/test/markdownlint-test-custom-rules.js
+++ b/test/markdownlint-test-custom-rules.js
@@ -656,7 +656,8 @@ test("customRulesOnErrorNull", (t) => new Promise((resolve) => {
     t.is(
       // @ts-ignore
       err.message,
-      "Property 'lineNumber' of onError parameter is incorrect.",
+      // eslint-disable-next-line max-len
+      "Value of 'lineNumber' passed to onError by 'NAME' is incorrect for 'string'.",
       "Did not get correct exception for null object."
     );
     t.true(!result, "Got result for function thrown.");
@@ -686,7 +687,8 @@ test("customRulesOnErrorNullSync", (t) => {
       markdownlint.sync(options);
     },
     {
-      "message": "Property 'lineNumber' of onError parameter is incorrect."
+      // eslint-disable-next-line max-len
+      "message": "Value of 'lineNumber' passed to onError by 'NAME' is incorrect for 'string'."
     },
     "Did not get correct exception for null object."
   );
@@ -775,7 +777,8 @@ test("customRulesOnErrorBad", (t) => {
         },
         {
           "message":
-            `Property '${propertyNames}' of onError parameter is incorrect.`
+            // eslint-disable-next-line max-len
+            `Value of '${propertyNames}' passed to onError by 'NAME' is incorrect for 'string'.`
         },
         "Did not get correct exception for bad object."
       );
@@ -845,7 +848,8 @@ test("customRulesOnErrorInvalid", (t) => {
         },
         {
           "message":
-            `Property '${propertyNames}' of onError parameter is incorrect.`
+            // eslint-disable-next-line max-len
+            `Value of '${propertyNames}' passed to onError by 'NAME' is incorrect for 'string'.`
         },
         "Did not get correct exception for invalid object."
       );
@@ -1052,7 +1056,8 @@ test("customRulesOnErrorInvalidHandled", (t) => new Promise((resolve) => {
           "ruleDescription": "description",
           "ruleInformation": null,
           "errorDetail": "This rule threw an exception: " +
-            "Property 'lineNumber' of onError parameter is incorrect.",
+            // eslint-disable-next-line max-len
+            "Value of 'lineNumber' passed to onError by 'NAME' is incorrect for 'string'.",
           "errorContext": null,
           "errorRange": null,
           "fixInfo": null
@@ -1093,7 +1098,8 @@ test("customRulesOnErrorInvalidHandledSync", (t) => {
         "ruleDescription": "description",
         "ruleInformation": null,
         "errorDetail": "This rule threw an exception: " +
-          "Property 'lineNumber' of onError parameter is incorrect.",
+          // eslint-disable-next-line max-len
+          "Value of 'lineNumber' passed to onError by 'NAME' is incorrect for 'string'.",
         "errorContext": null,
         "errorRange": null,
         "fixInfo": null