diff --git a/tests/expectations/both/expand_dep.c b/tests/expectations/both/expand_dep.c
new file mode 100644
index 0000000..4012289
--- /dev/null
+++ b/tests/expectations/both/expand_dep.c
@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct dep_struct {
+  uint32_t x;
+  double y;
+} dep_struct;
+
+uint32_t get_x(const dep_struct *dep_struct);
diff --git a/tests/expectations/both/expand_dep.compat.c b/tests/expectations/both/expand_dep.compat.c
new file mode 100644
index 0000000..056089e
--- /dev/null
+++ b/tests/expectations/both/expand_dep.compat.c
@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct dep_struct {
+  uint32_t x;
+  double y;
+} dep_struct;
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+uint32_t get_x(const dep_struct *dep_struct);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
diff --git a/tests/expectations/expand_dep.c b/tests/expectations/expand_dep.c
new file mode 100644
index 0000000..3d2cf8e
--- /dev/null
+++ b/tests/expectations/expand_dep.c
@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct {
+  uint32_t x;
+  double y;
+} dep_struct;
+
+uint32_t get_x(const dep_struct *dep_struct);
diff --git a/tests/expectations/expand_dep.compat.c b/tests/expectations/expand_dep.compat.c
new file mode 100644
index 0000000..4dc7fb3
--- /dev/null
+++ b/tests/expectations/expand_dep.compat.c
@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct {
+  uint32_t x;
+  double y;
+} dep_struct;
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+uint32_t get_x(const dep_struct *dep_struct);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
diff --git a/tests/expectations/expand_dep.cpp b/tests/expectations/expand_dep.cpp
new file mode 100644
index 0000000..f03f098
--- /dev/null
+++ b/tests/expectations/expand_dep.cpp
@@ -0,0 +1,15 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <new>
+
+struct dep_struct {
+  uint32_t x;
+  double y;
+};
+
+extern "C" {
+
+uint32_t get_x(const dep_struct *dep_struct);
+
+} // extern "C"
diff --git a/tests/expectations/tag/expand_dep.c b/tests/expectations/tag/expand_dep.c
new file mode 100644
index 0000000..45fcba6
--- /dev/null
+++ b/tests/expectations/tag/expand_dep.c
@@ -0,0 +1,11 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+struct dep_struct {
+  uint32_t x;
+  double y;
+};
+
+uint32_t get_x(const struct dep_struct *dep_struct);
diff --git a/tests/expectations/tag/expand_dep.compat.c b/tests/expectations/tag/expand_dep.compat.c
new file mode 100644
index 0000000..344af64
--- /dev/null
+++ b/tests/expectations/tag/expand_dep.compat.c
@@ -0,0 +1,19 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+struct dep_struct {
+  uint32_t x;
+  double y;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+uint32_t get_x(const struct dep_struct *dep_struct);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
diff --git a/tests/rust/expand_dep/Cargo.lock b/tests/rust/expand_dep/Cargo.lock
new file mode 100644
index 0000000..0de81e9
--- /dev/null
+++ b/tests/rust/expand_dep/Cargo.lock
@@ -0,0 +1,13 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "dep"
+version = "0.1.0"
+
+[[package]]
+name = "expand-dep"
+version = "0.1.0"
+dependencies = [
+ "dep 0.1.0",
+]
+
diff --git a/tests/rust/expand_dep/Cargo.toml b/tests/rust/expand_dep/Cargo.toml
new file mode 100644
index 0000000..40e3e8b
--- /dev/null
+++ b/tests/rust/expand_dep/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "expand-dep"
+version = "0.1.0"
+authors = ["cbindgen"]
+edition = "2018"
+
+[dependencies]
+dep = { path = "dep" }
diff --git a/tests/rust/expand_dep/cbindgen.toml b/tests/rust/expand_dep/cbindgen.toml
new file mode 100644
index 0000000..b6e180a
--- /dev/null
+++ b/tests/rust/expand_dep/cbindgen.toml
@@ -0,0 +1,6 @@
+[parse]
+parse_deps = true
+include = ["dep"]
+
+[parse.expand]
+crates = ["expand-dep"]
diff --git a/tests/rust/expand_dep/dep/Cargo.toml b/tests/rust/expand_dep/dep/Cargo.toml
new file mode 100644
index 0000000..1cc8d62
--- /dev/null
+++ b/tests/rust/expand_dep/dep/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "dep"
+version = "0.1.0"
+authors = ["cbindgen"]
+edition = "2018"
+
+[dependencies]
diff --git a/tests/rust/expand_dep/dep/src/lib.rs b/tests/rust/expand_dep/dep/src/lib.rs
new file mode 100644
index 0000000..7253c57
--- /dev/null
+++ b/tests/rust/expand_dep/dep/src/lib.rs
@@ -0,0 +1,5 @@
+#[repr(C)]
+pub struct dep_struct {
+    pub x: u32,
+    pub y: f64,
+}
diff --git a/tests/rust/expand_dep/src/lib.rs b/tests/rust/expand_dep/src/lib.rs
new file mode 100644
index 0000000..639678d
--- /dev/null
+++ b/tests/rust/expand_dep/src/lib.rs
@@ -0,0 +1,6 @@
+use dep::dep_struct;
+
+#[no_mangle]
+pub unsafe extern "C" fn get_x(dep_struct: *const dep_struct) -> u32 {
+    dep_struct.read().x
+}