diff --git a/nodejs/__test__/arrow.test.ts b/nodejs/__test__/arrow.test.ts
index f379d3bd..e9e07c86 100644
--- a/nodejs/__test__/arrow.test.ts
+++ b/nodejs/__test__/arrow.test.ts
@@ -1023,35 +1023,35 @@ describe.each([arrow15, arrow16, arrow17, arrow18])(
         expect(table.getChild("test")!.get(2)).toBe(false);
       });
     });
+
+    // Test for the undefined values bug fix
+    describe("undefined values handling", () => {
+      it("should handle mixed undefined and actual values", () => {
+        const schema = new Schema([
+          new Field("text", new Utf8(), true), // nullable
+          new Field("number", new Int32(), true), // nullable
+          new Field("bool", new Bool(), true), // nullable
+        ]);
+
+        const data = [
+          { text: undefined, number: 42, bool: true },
+          { text: "hello", number: undefined, bool: false },
+          { text: "world", number: 123, bool: undefined },
+        ];
+        const table = makeArrowTable(data, { schema });
+
+        const result = table.toArray();
+        expect(result).toHaveLength(3);
+        expect(result[0].text).toBe(null);
+        expect(result[0].number).toBe(42);
+        expect(result[0].bool).toBe(true);
+        expect(result[1].text).toBe("hello");
+        expect(result[1].number).toBe(null);
+        expect(result[1].bool).toBe(false);
+        expect(result[2].text).toBe("world");
+        expect(result[2].number).toBe(123);
+        expect(result[2].bool).toBe(null);
+      });
+    });
   },
 );
-
-// Test for the undefined values bug fix
-describe("undefined values handling", () => {
-  it("should handle mixed undefined and actual values", () => {
-    const schema = new Schema([
-      new Field("text", new Utf8(), true), // nullable
-      new Field("number", new Int32(), true), // nullable
-      new Field("bool", new Bool(), true), // nullable
-    ]);
-
-    const data = [
-      { text: undefined, number: 42, bool: true },
-      { text: "hello", number: undefined, bool: false },
-      { text: "world", number: 123, bool: undefined },
-    ];
-    const table = makeArrowTable(data, { schema });
-
-    const result = table.toArray();
-    expect(result).toHaveLength(3);
-    expect(result[0].text).toBe(null);
-    expect(result[0].number).toBe(42);
-    expect(result[0].bool).toBe(true);
-    expect(result[1].text).toBe("hello");
-    expect(result[1].number).toBe(null);
-    expect(result[1].bool).toBe(false);
-    expect(result[2].text).toBe("world");
-    expect(result[2].number).toBe(123);
-    expect(result[2].bool).toBe(null);
-  });
-});