diff --git a/console/unicode_width_test.ts b/console/unicode_width_test.ts
index b5d7a1d7820e..07e2ec90b76e 100644
--- a/console/unicode_width_test.ts
+++ b/console/unicode_width_test.ts
@@ -43,4 +43,18 @@ Deno.test("unicodeWidth()", async (t) => {
     // See discussion at https://github.com/denoland/deno_std/pull/3297#discussion_r1166289430
     assertEquals(unicodeWidth("👩‍🔬"), 4); // Woman Scientist
   });
+
+  await t.step("checks escape sequences", () => {
+    assertEquals(unicodeWidth("\0"), 0);
+    assertEquals(unicodeWidth("\n"), 0);
+    assertEquals(unicodeWidth("\r"), 0);
+    assertEquals(unicodeWidth("\t"), 0);
+  });
+
+  await t.step("checks C1 controls", () => {
+    assertEquals(unicodeWidth("\u0080"), 0);
+    assertEquals(unicodeWidth("\u008A"), 0);
+    assertEquals(unicodeWidth("\u0093"), 0);
+    assertEquals(unicodeWidth("\u009F"), 0);
+  });
 });