diff --git a/rules/assertion-arguments.js b/rules/assertion-arguments.js
index 3eb58cb..e369eee 100644
--- a/rules/assertion-arguments.js
+++ b/rules/assertion-arguments.js
@@ -399,6 +399,7 @@ const schema = [{
 			default: undefined,
 		},
 	},
+	additionalProperties: false,
 }];
 
 module.exports = {
diff --git a/rules/no-ignored-test-files.js b/rules/no-ignored-test-files.js
index ef1c8d6..3e7b64e 100644
--- a/rules/no-ignored-test-files.js
+++ b/rules/no-ignored-test-files.js
@@ -60,6 +60,7 @@ const schema = [{
 			type: 'array',
 		},
 	},
+	additionalProperties: false,
 }];
 
 module.exports = {
diff --git a/rules/no-import-test-files.js b/rules/no-import-test-files.js
index dcaacc6..e003cf0 100644
--- a/rules/no-import-test-files.js
+++ b/rules/no-import-test-files.js
@@ -72,6 +72,7 @@ const schema = [{
 			type: 'array',
 		},
 	},
+	additionalProperties: false,
 }];
 
 module.exports = {
diff --git a/rules/test-title-format.js b/rules/test-title-format.js
index 2911687..1e14edc 100644
--- a/rules/test-title-format.js
+++ b/rules/test-title-format.js
@@ -45,6 +45,7 @@ const schema = [
 				default: undefined,
 			},
 		},
+		additionalProperties: false,
 	},
 ];