diff --git a/test/standalone/static_c_lib/foo.c b/test/standalone/static_c_lib/foo.c
index 2366282d47..78a332a6ee 100644
--- a/test/standalone/static_c_lib/foo.c
+++ b/test/standalone/static_c_lib/foo.c
@@ -2,3 +2,5 @@
 uint32_t add(uint32_t a, uint32_t b) {
     return a + b;
 }
+
+uint32_t foo = 12345;
diff --git a/test/standalone/static_c_lib/foo.h b/test/standalone/static_c_lib/foo.h
index e8ebb9842e..6700499fe8 100644
--- a/test/standalone/static_c_lib/foo.h
+++ b/test/standalone/static_c_lib/foo.h
@@ -1,2 +1,3 @@
 #include <stdint.h>
 uint32_t add(uint32_t a, uint32_t b);
+extern uint32_t foo;
diff --git a/test/standalone/static_c_lib/foo.zig b/test/standalone/static_c_lib/foo.zig
index edf94539c8..a5ba90c95d 100644
--- a/test/standalone/static_c_lib/foo.zig
+++ b/test/standalone/static_c_lib/foo.zig
@@ -6,3 +6,7 @@ test "C add" {
     const result = c.add(1, 2);
     expect(result == 3);
 }
+
+test "C extern variable" {
+    expect(c.foo == 12345);
+}