diff --git a/tests/others/mapping.rs b/tests/others/mapping.rs
new file mode 100644
index 0000000..9700d36
--- /dev/null
+++ b/tests/others/mapping.rs
@@ -0,0 +1,18 @@
+use alemat::{
+    elements::{grouping::Row, Frac, Ident},
+    MathMl,
+};
+
+#[test]
+fn map_in_row() {
+    let out = MathMl::with_content(
+        Frac::builder()
+            .num(Ident::from("x"))
+            .denom(Ident::from("y"))
+            .build(),
+    )
+    .map(Row::from)
+    .render();
+
+    crate::snap_test!(out, name: "others_map_in_row");
+}
diff --git a/tests/others/mod.rs b/tests/others/mod.rs
index 0c02ca0..071ff78 100644
--- a/tests/others/mod.rs
+++ b/tests/others/mod.rs
@@ -1,4 +1,5 @@
 mod annotation;
+mod mapping;
 mod mfrac;
 mod mi;
 mod mn;
diff --git a/tests/snapshots/others_map_in_row.snap b/tests/snapshots/others_map_in_row.snap
new file mode 100644
index 0000000..35f9b62
--- /dev/null
+++ b/tests/snapshots/others_map_in_row.snap
@@ -0,0 +1,17 @@
+---
+source: tests/others/mapping.rs
+expression: input
+---
+<math>
+  <mrow>
+    <mfrac>
+      <mi>
+        x
+      </mi>
+      <mi>
+        y
+      </mi>
+    </mfrac>
+  </mrow>
+</math>
+