diff --git a/tests/expectations/mangle.both.c b/tests/expectations/mangle.both.c
index c0f77503e..71408c821 100644
--- a/tests/expectations/mangle.both.c
+++ b/tests/expectations/mangle.both.c
@@ -3,10 +3,15 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+typedef enum Bar {
+  BarSome,
+  BarThing,
+} Bar;
+
 typedef struct FooU8 {
   uint8_t a;
 } FooU8;
 
 typedef struct FooU8 Boo;
 
-void root(Boo x);
+void root(Boo x, enum Bar y);
diff --git a/tests/expectations/mangle.both.compat.c b/tests/expectations/mangle.both.compat.c
index b5766da57..ceefcc8f0 100644
--- a/tests/expectations/mangle.both.compat.c
+++ b/tests/expectations/mangle.both.compat.c
@@ -3,6 +3,11 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+typedef enum Bar {
+  BarSome,
+  BarThing,
+} Bar;
+
 typedef struct FooU8 {
   uint8_t a;
 } FooU8;
@@ -13,7 +18,7 @@ typedef struct FooU8 Boo;
 extern "C" {
 #endif // __cplusplus
 
-void root(Boo x);
+void root(Boo x, enum Bar y);
 
 #ifdef __cplusplus
 } // extern "C"
diff --git a/tests/expectations/mangle.c b/tests/expectations/mangle.c
index 4da70822c..ccd811771 100644
--- a/tests/expectations/mangle.c
+++ b/tests/expectations/mangle.c
@@ -3,10 +3,15 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+typedef enum {
+  BarSome,
+  BarThing,
+} Bar;
+
 typedef struct {
   uint8_t a;
 } FooU8;
 
 typedef FooU8 Boo;
 
-void root(Boo x);
+void root(Boo x, Bar y);
diff --git a/tests/expectations/mangle.compat.c b/tests/expectations/mangle.compat.c
index fe1a74d79..2bfe97a8b 100644
--- a/tests/expectations/mangle.compat.c
+++ b/tests/expectations/mangle.compat.c
@@ -3,6 +3,11 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+typedef enum {
+  BarSome,
+  BarThing,
+} Bar;
+
 typedef struct {
   uint8_t a;
 } FooU8;
@@ -13,7 +18,7 @@ typedef FooU8 Boo;
 extern "C" {
 #endif // __cplusplus
 
-void root(Boo x);
+void root(Boo x, Bar y);
 
 #ifdef __cplusplus
 } // extern "C"
diff --git a/tests/expectations/mangle.cpp b/tests/expectations/mangle.cpp
index 3b8f4d4c0..95224c9bd 100644
--- a/tests/expectations/mangle.cpp
+++ b/tests/expectations/mangle.cpp
@@ -4,6 +4,11 @@
 #include <ostream>
 #include <new>
 
+enum class Bar {
+  BarSome,
+  BarThing,
+};
+
 template<typename T>
 struct Foo {
   T a;
@@ -13,6 +18,6 @@ using Boo = Foo<uint8_t>;
 
 extern "C" {
 
-void root(Boo x);
+void root(Boo x, Bar y);
 
 } // extern "C"
diff --git a/tests/expectations/mangle.pyx b/tests/expectations/mangle.pyx
index 742235923..ddb1977b7 100644
--- a/tests/expectations/mangle.pyx
+++ b/tests/expectations/mangle.pyx
@@ -6,9 +6,13 @@ cdef extern from *:
 
 cdef extern from *:
 
+  ctypedef enum Bar:
+    BarSome,
+    BarThing,
+
   ctypedef struct FooU8:
     uint8_t a;
 
   ctypedef FooU8 Boo;
 
-  void root(Boo x);
+  void root(Boo x, Bar y);
diff --git a/tests/expectations/mangle.tag.c b/tests/expectations/mangle.tag.c
index 616511057..caa759c46 100644
--- a/tests/expectations/mangle.tag.c
+++ b/tests/expectations/mangle.tag.c
@@ -3,10 +3,15 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+enum Bar {
+  BarSome,
+  BarThing,
+};
+
 struct FooU8 {
   uint8_t a;
 };
 
 typedef struct FooU8 Boo;
 
-void root(Boo x);
+void root(Boo x, enum Bar y);
diff --git a/tests/expectations/mangle.tag.compat.c b/tests/expectations/mangle.tag.compat.c
index 3b94dfa7e..7d7e99269 100644
--- a/tests/expectations/mangle.tag.compat.c
+++ b/tests/expectations/mangle.tag.compat.c
@@ -3,6 +3,11 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+enum Bar {
+  BarSome,
+  BarThing,
+};
+
 struct FooU8 {
   uint8_t a;
 };
@@ -13,7 +18,7 @@ typedef struct FooU8 Boo;
 extern "C" {
 #endif // __cplusplus
 
-void root(Boo x);
+void root(Boo x, enum Bar y);
 
 #ifdef __cplusplus
 } // extern "C"
diff --git a/tests/expectations/mangle.tag.pyx b/tests/expectations/mangle.tag.pyx
index d362ca88f..4a54cc845 100644
--- a/tests/expectations/mangle.tag.pyx
+++ b/tests/expectations/mangle.tag.pyx
@@ -6,9 +6,13 @@ cdef extern from *:
 
 cdef extern from *:
 
+  cdef enum Bar:
+    BarSome,
+    BarThing,
+
   cdef struct FooU8:
     uint8_t a;
 
   ctypedef FooU8 Boo;
 
-  void root(Boo x);
+  void root(Boo x, Bar y);
diff --git a/tests/rust/mangle.rs b/tests/rust/mangle.rs
index b4aa46df5..1ac7e1336 100644
--- a/tests/rust/mangle.rs
+++ b/tests/rust/mangle.rs
@@ -5,7 +5,15 @@ pub struct Foo<T> {
 
 pub type Boo = Foo<u8>;
 
+/// cbindgen:prefix-with-name=true
+#[repr(C)]
+pub enum Bar {
+    Some,
+    Thing,
+}
+
 #[no_mangle]
 pub extern "C" fn root(
     x: Boo,
+    y: Bar,
 ) { }