diff --git a/tests/structs/src/debug_derive.c b/tests/structs/src/debug_derive.c
new file mode 100644
index 0000000000..562b20810e
--- /dev/null
+++ b/tests/structs/src/debug_derive.c
@@ -0,0 +1,29 @@
+//! derive:Debug
+
+#include <stdarg.h>
+
+typedef struct {
+    int a;
+} Debuggable1;
+
+typedef struct {
+    va_list v;
+} Debuggable2;
+
+Debuggable1 *kDebuggable1;
+Debuggable2 *kDebuggable2;
+
+// A struct containing a union cannot derive Debug, so make
+// sure we don't generate a #[derive] for it
+typedef struct {
+    struct {
+        struct {
+            union {
+                int d;
+                float e;
+            } c;
+        } b;
+    } a;
+} NotDebuggable1;
+
+NotDebuggable1 kNotDebuggable1;
diff --git a/tests/structs/src/debug_derive_bad.c b/tests/structs/src/debug_derive_bad.c
deleted file mode 100644
index fa62720424..0000000000
--- a/tests/structs/src/debug_derive_bad.c
+++ /dev/null
@@ -1,15 +0,0 @@
-//! derive:Debug
-
-// A struct containing a union is not debuggable
-typedef struct {
-    struct {
-        struct {
-            union {
-                int d;
-                float e;
-            } c;
-        } b;
-    } a;
-} StructWithUnion;
-
-StructWithUnion kStructWithUnion;
\ No newline at end of file
diff --git a/tests/structs/src/debug_derive_good.c b/tests/structs/src/debug_derive_good.c
deleted file mode 100644
index bdbf71ea03..0000000000
--- a/tests/structs/src/debug_derive_good.c
+++ /dev/null
@@ -1,14 +0,0 @@
-//! derive:Debug
-
-#include <stdarg.h>
-
-typedef struct {
-    int a;
-} S1;
-
-typedef struct {
-    va_list v;
-} S2;
-
-S1 *kS1;
-S2 *kS2;
diff --git a/tests/structs/src/test_debug_derive.rs b/tests/structs/src/test_debug_derive.rs
new file mode 100644
index 0000000000..bd5b7a1a3e
--- /dev/null
+++ b/tests/structs/src/test_debug_derive.rs
@@ -0,0 +1,11 @@
+//! feature_c_variadic
+
+use crate::debug_derive::{rust_kDebuggable1, rust_kDebuggable2};
+use std::fmt::Debug;
+
+pub fn test_debuggable() {
+    unsafe {
+        // Make sure all debuggable structs implement `Debug`
+        let _debuggable: Vec<*mut dyn Debug> = vec![rust_kDebuggable1, rust_kDebuggable2];
+    }
+}
diff --git a/tests/structs/src/test_debug_derive_bad.rs b/tests/structs/src/test_debug_derive_bad.rs
deleted file mode 100644
index bb09029fab..0000000000
--- a/tests/structs/src/test_debug_derive_bad.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-//! xfail
-
-mod debug_derive_bad;
-use debug_derive_bad::rust_kStructWithUnion;
-
-pub fn test_union() {
-    unsafe {
-        format!("{rust_kStructWithUnion:?}");
-    }
-}
diff --git a/tests/structs/src/test_debug_derive_good.rs b/tests/structs/src/test_debug_derive_good.rs
deleted file mode 100644
index cdf558d69c..0000000000
--- a/tests/structs/src/test_debug_derive_good.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-//! feature_c_variadic
-
-use crate::debug_derive_good::{rust_kS1, rust_kS2};
-use std::fmt::Debug;
-
-pub fn test_debuggable() {
-    unsafe {
-        // Make sure each struct implements `Debug`
-        let _debuggable: Vec<*mut dyn Debug> = vec![rust_kS1, rust_kS2];
-    }
-}