diff --git a/tests/ref/math-attach-with-numbers.png b/tests/ref/math-attach-with-numbers.png
new file mode 100644
index 000000000..81f4e2b78
Binary files /dev/null and b/tests/ref/math-attach-with-numbers.png differ
diff --git a/tests/suite/math/attach.typ b/tests/suite/math/attach.typ
index cedc3a4ab..1a345abd1 100644
--- a/tests/suite/math/attach.typ
+++ b/tests/suite/math/attach.typ
@@ -189,3 +189,9 @@ $ a0 + a1 + a0_2 \
 // sequence of extended shapes).
 $lr(size: #130%, [x])_0^1, [x]_0^1, \]_0^1, x_0^1, A_0^1$ \
 $n^2, (n + 1)^2, sum_0^1, integral_0^1$
+
+
+--- math-attach-with-numbers ---
+// Test that underscores in code numeric literals do not conflict with
+// subscripts in math mode.
+$3_5$