diff --git a/packages/babel-plugin-minify-dead-code-elimination/__tests__/dead-code-elimination-test.js b/packages/babel-plugin-minify-dead-code-elimination/__tests__/dead-code-elimination-test.js
index 045305e7d..99b8f3e32 100644
--- a/packages/babel-plugin-minify-dead-code-elimination/__tests__/dead-code-elimination-test.js
+++ b/packages/babel-plugin-minify-dead-code-elimination/__tests__/dead-code-elimination-test.js
@@ -405,6 +405,28 @@ describe("dce-plugin", () => {
   `
   );
 
+  thePlugin(
+    "should not inline vars modified in different var statements - issue #685",
+    `
+    function f() {
+      var a = 1;
+      var b = a;
+      var a = 2;
+      console.log(a, b);
+    }
+    f();
+  `,
+    `
+    function f() {
+      var a = 1;
+      var b = a;
+      var a = 2;
+      console.log(a, b);
+    }
+    f();
+  `
+  );
+
   thePlugin(
     "should remove redundant returns",
     `