diff --git a/aedi/target/special.py b/aedi/target/special.py
index cd3c4268..4f4c4311 100644
--- a/aedi/target/special.py
+++ b/aedi/target/special.py
@@ -75,6 +75,7 @@ class TestDepsTarget(BuildTarget):
                 '-arch', 'x86_64',
                 '-arch', 'arm64',
                 '-std=c++17',
+                '-include', os.path.join(test_path, 'aedi.h'),
                 '-o', exe_name,
                 entry.path,
             ]
diff --git a/test/aedi.h b/test/aedi.h
new file mode 100644
index 00000000..25f0c4e4
--- /dev/null
+++ b/test/aedi.h
@@ -0,0 +1,3 @@
+#define AEDI_EXPECT(CODE) if (!(CODE)) { puts(#CODE); return 1; }
+
+extern "C" int puts(const char*);