diff --git a/test_suite/tests/test_enum_adjacently_tagged.rs b/test_suite/tests/test_enum_adjacently_tagged.rs
index 6c252023..8546c9a4 100644
--- a/test_suite/tests/test_enum_adjacently_tagged.rs
+++ b/test_suite/tests/test_enum_adjacently_tagged.rs
@@ -78,6 +78,43 @@ mod unit {
         );
     }
 
+    #[test]
+    fn map_bytes_tag_only() {
+        // Map: tag only
+        assert_de_tokens(
+            &AdjacentlyTagged::Unit::<u8>,
+            &[
+                Token::Struct {
+                    name: "AdjacentlyTagged",
+                    len: 1,
+                },
+                Token::Bytes(b"t"),
+                Token::UnitVariant {
+                    name: "AdjacentlyTagged",
+                    variant: "Unit",
+                },
+                Token::StructEnd,
+            ],
+        );
+
+        // Map: tag only
+        assert_de_tokens(
+            &AdjacentlyTagged::Unit::<u8>,
+            &[
+                Token::Struct {
+                    name: "AdjacentlyTagged",
+                    len: 1,
+                },
+                Token::BorrowedBytes(b"t"),
+                Token::UnitVariant {
+                    name: "AdjacentlyTagged",
+                    variant: "Unit",
+                },
+                Token::StructEnd,
+            ],
+        );
+    }
+
     #[test]
     fn map_str_tag_content() {
         // Map: tag + content
@@ -184,6 +221,47 @@ mod unit {
         );
     }
 
+    #[test]
+    fn map_bytes_tag_content() {
+        // Map: tag + content
+        assert_de_tokens(
+            &AdjacentlyTagged::Unit::<u8>,
+            &[
+                Token::Struct {
+                    name: "AdjacentlyTagged",
+                    len: 2,
+                },
+                Token::BorrowedBytes(b"t"),
+                Token::UnitVariant {
+                    name: "AdjacentlyTagged",
+                    variant: "Unit",
+                },
+                Token::BorrowedBytes(b"c"),
+                Token::Unit,
+                Token::StructEnd,
+            ],
+        );
+
+        // Map: content + tag
+        assert_de_tokens(
+            &AdjacentlyTagged::Unit::<u8>,
+            &[
+                Token::Struct {
+                    name: "AdjacentlyTagged",
+                    len: 2,
+                },
+                Token::Bytes(b"c"),
+                Token::Unit,
+                Token::Bytes(b"t"),
+                Token::UnitVariant {
+                    name: "AdjacentlyTagged",
+                    variant: "Unit",
+                },
+                Token::StructEnd,
+            ],
+        );
+    }
+
     #[test]
     fn seq_tag_content() {
         // Seq: tag and content