diff --git a/test/parser.test.ts b/test/parser.test.ts
index b1794c0..7180fee 100644
--- a/test/parser.test.ts
+++ b/test/parser.test.ts
@@ -15,6 +15,32 @@ describe("parseRawArgs", () => {
     });
   });
 
+  it("handles --<arg>=<value>", () => {
+    const result = parseRawArgs(["--name=John"], {
+      string: ["name"],
+    });
+
+    expect(result).toEqual({
+      _: [],
+      name: "John",
+    });
+  });
+
+  it.fails("handles -<arg>=<value> with alias (#237)", () => {
+    const result = parseRawArgs(["-n=John"], {
+      string: ["name"],
+      alias: {
+        n: ["name"],
+      },
+    });
+
+    expect(result).toEqual({
+      _: [],
+      n: "John",
+      name: "John",
+    });
+  });
+
   it("handles default values", () => {
     const result = parseRawArgs([], { default: { name: "Default" } });