diff --git a/betterproto/tests/inputs/config.py b/betterproto/tests/inputs/config.py
index 2525d8f..933fe96 100644
--- a/betterproto/tests/inputs/config.py
+++ b/betterproto/tests/inputs/config.py
@@ -13,6 +13,7 @@ tests = {
     "namespace_builtin_types",  # 53
     "googletypes_struct",  # 9
     "googletypes_value",  # 9
+    "to_dict_with_missing_enum",  # 93
 }
 
 services = {
diff --git a/betterproto/tests/inputs/to_dict_with_missing_enum/test_to_dict_with_missing_enum.py b/betterproto/tests/inputs/to_dict_with_missing_enum/test_to_dict_with_missing_enum.py
new file mode 100644
index 0000000..7c56f74
--- /dev/null
+++ b/betterproto/tests/inputs/to_dict_with_missing_enum/test_to_dict_with_missing_enum.py
@@ -0,0 +1,7 @@
+from betterproto.tests.output_betterproto.to_dict_with_missing_enum.to_dict_with_missing_enum import TestMessage
+
+
+def test_message_attributes():
+    assert TestMessage(x=TestMessage.MyEnum.ONE).to_dict()['x'] == "ONE", "MyEnum.ONE is not serialized to 'ONE'"
+    assert TestMessage(x=TestMessage.MyEnum.THREE).to_dict()['x'] == "THREE", "MyEnum.THREE is not serialized to 'THREE'"
+    assert TestMessage(x=TestMessage.MyEnum.FOUR).to_dict()['x'] == "FOUR", "MyEnum.FOUR is not serialized to 'FOUR'"
diff --git a/betterproto/tests/inputs/to_dict_with_missing_enum/to_dict_with_missing_enum.proto b/betterproto/tests/inputs/to_dict_with_missing_enum/to_dict_with_missing_enum.proto
new file mode 100644
index 0000000..56d2cf9
--- /dev/null
+++ b/betterproto/tests/inputs/to_dict_with_missing_enum/to_dict_with_missing_enum.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+message TestMessage {
+  enum MyEnum {
+    ZERO = 0;
+    ONE = 1;
+    // TWO = 2;
+    THREE = 3;
+    FOUR = 4;
+  }
+  MyEnum x = 1;
+}