diff --git a/schemars/tests/enum.rs b/schemars/tests/enum.rs
new file mode 100644
index 0000000..cb3073c
--- /dev/null
+++ b/schemars/tests/enum.rs
@@ -0,0 +1,44 @@
+mod util;
+use schemars::MakeSchema;
+use util::*;
+
+#[derive(Debug, MakeSchema)]
+#[schemars(rename_all = "camelCase")]
+pub enum External {
+    UnitOne,
+    String(String),
+    Struct{ foo: i32, bar: bool },
+    UnitTwo,
+}
+
+#[test]
+fn enum_external_tag() -> TestResult {
+    test_default_generated_schema::<External>("enum-external")
+}
+/*
+#[derive(Debug, MakeSchema)]
+#[schemars(tag = "typeProperty")]
+pub enum Internal {
+    UnitOne,
+    String(String),
+    Struct{ foo: i32, bar: bool },
+    UnitTwo,
+}
+
+#[test]
+fn enum_internal_tag() -> TestResult {
+    test_default_generated_schema::<Internal>("enum-internal")
+}
+*/
+#[derive(Debug, MakeSchema)]
+#[schemars(untagged)]
+pub enum Untagged {
+    UnitOne,
+    String(String),
+    Struct{ foo: i32, bar: bool }
+}
+
+#[test]
+fn enum_untagged() -> TestResult {
+    test_default_generated_schema::<Untagged>("enum-untagged")
+}
diff --git a/schemars/tests/expected/enum-external.json b/schemars/tests/expected/enum-external.json
new file mode 100644
index 0000000..021fcba
--- /dev/null
+++ b/schemars/tests/expected/enum-external.json
@@ -0,0 +1,46 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "External",
+  "anyOf": [
+    {
+      "enum": [
+        "unitOne",
+        "unitTwo"
+      ]
+    },
+    {
+      "type": "object",
+      "properties": {
+        "string": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "string"
+      ]
+    },
+    {
+      "type": "object",
+      "properties": {
+        "struct": {
+          "type": "object",
+          "properties": {
+            "bar": {
+              "type": "boolean"
+            },
+            "foo": {
+              "type": "integer"
+            }
+          },
+          "required": [
+            "bar",
+            "foo"
+          ]
+        }
+      },
+      "required": [
+        "struct"
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/schemars/tests/expected/enum-internal.json b/schemars/tests/expected/enum-internal.json
new file mode 100644
index 0000000..f50e5de
--- /dev/null
+++ b/schemars/tests/expected/enum-internal.json
@@ -0,0 +1,222 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Schema",
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "$ref": "#/definitions/Ref"
+    },
+    {
+      "$ref": "#/definitions/SchemaObject"
+    }
+  ],
+  "definitions": {
+    "InstanceType": {
+      "enum": [
+        "null",
+        "boolean",
+        "object",
+        "array",
+        "number",
+        "string",
+        "integer"
+      ]
+    },
+    "Schema": {
+      "anyOf": [
+        {
+          "type": "boolean"
+        },
+        {
+          "$ref": "#/definitions/Ref"
+        },
+        {
+          "$ref": "#/definitions/SchemaObject"
+        }
+      ]
+    },
+    "SchemaObject": {
+      "type": "object",
+      "properties": {
+        "$id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "$schema": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "allOf": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Schema"
+              }
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "anyOf": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Schema"
+              }
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "definitions": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/Schema"
+          }
+        },
+        "description": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "enum": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": true
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "items": {
+          "anyOf": [
+            {
+              "$ref": "#/definitions/SingleOrVec_For_Schema"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "not": {
+          "anyOf": [
+            {
+              "$ref": "#/definitions/Schema"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "oneOf": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/Schema"
+              }
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "properties": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/Schema"
+          }
+        },
+        "required": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "title": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "type": {
+          "anyOf": [
+            {
+              "$ref": "#/definitions/SingleOrVec_For_InstanceType"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "additionalProperties": true
+    },
+    "Ref": {
+      "type": "object",
+      "properties": {
+        "$ref": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "$ref"
+      ]
+    },
+    "SingleOrVec_For_InstanceType": {
+      "anyOf": [
+        {
+          "$ref": "#/definitions/InstanceType"
+        },
+        {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/InstanceType"
+          }
+        }
+      ]
+    },
+    "SingleOrVec_For_Schema": {
+      "anyOf": [
+        {
+          "$ref": "#/definitions/Schema"
+        },
+        {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/Schema"
+          }
+        }
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/schemars/tests/expected/enum-untagged.json b/schemars/tests/expected/enum-untagged.json
new file mode 100644
index 0000000..441329b
--- /dev/null
+++ b/schemars/tests/expected/enum-untagged.json
@@ -0,0 +1,27 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Untagged",
+  "anyOf": [
+    {
+      "type": "null"
+    },
+    {
+      "type": "string"
+    },
+    {
+      "type": "object",
+      "properties": {
+        "bar": {
+          "type": "boolean"
+        },
+        "foo": {
+          "type": "integer"
+        }
+      },
+      "required": [
+        "bar",
+        "foo"
+      ]
+    }
+  ]
+}
\ No newline at end of file