diff --git a/eslint/babel-eslint-plugin/rules/semi.js b/eslint/babel-eslint-plugin/rules/semi.js
index 95a2467bfc..2d2fcc4ed2 100644
--- a/eslint/babel-eslint-plugin/rules/semi.js
+++ b/eslint/babel-eslint-plugin/rules/semi.js
@@ -83,11 +83,11 @@ const semiRuleWithClassProperty = ruleComposer.joinReports([
                 }
             } else {
                 if (!isSemicolon(lastToken)) {
-                    if (!exceptOneLine || !isOneLinerBlock(node)) {
+                    if (!exceptOneLine || !isOneLinerBlock(context, node)) {
                         report(context, node);
                     }
                 } else {
-                    if (exceptOneLine && isOneLinerBlock(node)) {
+                    if (exceptOneLine && isOneLinerBlock(context, node)) {
                         report(context, node, true);
                     }
                 }
diff --git a/eslint/babel-eslint-plugin/tests/rules/semi.js b/eslint/babel-eslint-plugin/tests/rules/semi.js
index b3f4620df9..15ebea037f 100644
--- a/eslint/babel-eslint-plugin/tests/rules/semi.js
+++ b/eslint/babel-eslint-plugin/tests/rules/semi.js
@@ -103,10 +103,12 @@ ruleTester.run("semi", rule, {
         "class Foo { bar = 'example'; }",
         "class Foo { static bar = 'example'; }",
         { code: "async function foo() { for await (let thing of {}) { console.log(thing); } }", parserOptions: { ecmaVersion: 6 } },
+        { code: "class Foo { bar = () => {}; }", options: ["always", { omitLastInOneLineBlock: true }] },
 
         // babel, "never"
         { code: "class Foo { bar = 'example' }", options: ["never"] },
-        { code: "class Foo { static bar = 'example' }", options: ["never"] }
+        { code: "class Foo { static bar = 'example' }", options: ["never"] },
+        { code: "class Foo { bar = () => {} }", options: ["never"] },
     ],
     invalid: [
         { code: "import * as utils from './utils'", output: "import * as utils from './utils';", parserOptions: { sourceType: "module" }, errors: [{ message: "Missing semicolon.", type: "ImportDeclaration", column: 33 }] },
@@ -184,9 +186,19 @@ ruleTester.run("semi", rule, {
         // babel
         { code: "class Foo { bar = 'example' }", errors: [{ message: "Missing semicolon." }] },
         { code: "class Foo { static bar = 'example' }", errors: [{ message: "Missing semicolon." }] },
+        {
+            code: "class Foo { bar = () => {} }",
+            options: ["always", { omitLastInOneLineBlock: true }],
+            errors: [{ message: "Missing semicolon." }]
+        },
 
         // babel, "never"
         { code: "class Foo { bar = 'example'; }", options: ["never"], errors: [{ message: "Extra semicolon." }] },
-        { code: "class Foo { static bar = 'example'; }", options: ["never"], errors: [{ message: "Extra semicolon." }] }
+        { code: "class Foo { static bar = 'example'; }", options: ["never"], errors: [{ message: "Extra semicolon." }] },
+        {
+            code: "class Foo { bar = () => {}; }",
+            options: ["never"],
+            errors: [{ message: "Extra semicolon." }]
+        },
     ]
 });