diff --git a/packages/eslint-plugin/tests/rules/typedef.test.ts b/packages/eslint-plugin/tests/rules/typedef.test.ts
index c886fbcb12f..7a8270ed83c 100644
--- a/packages/eslint-plugin/tests/rules/typedef.test.ts
+++ b/packages/eslint-plugin/tests/rules/typedef.test.ts
@@ -101,7 +101,7 @@ ruleTester.run('typedef', rule, {
         },
       ],
     },
-    // Parameters
+    // Function parameters
     `function receivesNumber(a: number): void { }`,
     `function receivesStrings(a: string, b: string): void { }`,
     `function receivesNumber([a]: [number]): void { }`,
@@ -109,6 +109,13 @@ ruleTester.run('typedef', rule, {
     `function receivesString({ a }: { a: string }): void { }`,
     `function receivesStrings({ a, b }: { [i: string ]: string }): void { }`,
     `function receivesNumber(a: number = 123): void { }`,
+    // Method parameters
+    `class Test {
+      public method(x: number): number { return x; }
+    }`,
+    `class Test {
+      public method(x: number = 123): number { return x; }
+    }`,
     // Property declarations
     `type Test = {
        member: number;
@@ -292,7 +299,7 @@ ruleTester.run('typedef', rule, {
         },
       ],
     },
-    // Parameters
+    // Function parameters
     {
       code: `function receivesNumber(a): void { }`,
       errors: [
@@ -351,6 +358,29 @@ ruleTester.run('typedef', rule, {
         },
       ],
     },
+    // Method parameters
+    {
+      code: `class Test {
+        public method(x): number { return x; }
+      }`,
+      errors: [
+        {
+          column: 23,
+          messageId: 'expectedTypedefNamed',
+        },
+      ],
+    },
+    {
+      code: `class Test {
+        public method(x = 123): number { return x; }
+      }`,
+      errors: [
+        {
+          column: 23,
+          messageId: 'expectedTypedef',
+        },
+      ],
+    },
     // Property declarations
     {
       code: `type Test = {