diff --git a/src/test/stdtest/sys.rs b/src/test/stdtest/sys.rs
index 6f766e9ee6bb..8098d94a0a9b 100644
--- a/src/test/stdtest/sys.rs
+++ b/src/test/stdtest/sys.rs
@@ -4,3 +4,48 @@
 fn last_os_error() {
     log sys::last_os_error();
 }
+
+#[test]
+fn size_of_basic() {
+    assert sys::size_of::<u8>() == 1u;
+    assert sys::size_of::<u16>() == 2u;
+    assert sys::size_of::<u32>() == 4u;
+    assert sys::size_of::<u64>() == 8u;
+}
+
+#[test]
+#[cfg(target_arch = "x86")]
+#[cfg(target_arch = "arm")]
+fn size_of_32() {
+    assert sys::size_of::<uint>() == 4u;
+    assert sys::size_of::<*uint>() == 4u;
+}
+
+#[test]
+#[cfg(target_arch = "x86_64")]
+fn size_of_64() {
+    assert sys::size_of::<uint>() == 8u;
+    assert sys::size_of::<*uint>() == 8u;
+}
+
+#[test]
+fn align_of_basic() {
+    assert sys::align_of::<u8>() == 1u;
+    assert sys::align_of::<u16>() == 2u;
+    assert sys::align_of::<u32>() == 4u;
+}
+
+#[test]
+#[cfg(target_arch = "x86")]
+#[cfg(target_arch = "arm")]
+fn align_of_32() {
+    assert sys::align_of::<uint>() == 4u;
+    assert sys::align_of::<*uint>() == 4u;
+}
+
+#[test]
+#[cfg(target_arch = "x86_64")]
+fn align_of_64() {
+    assert sys::align_of::<uint>() == 8u;
+    assert sys::align_of::<*uint>() == 8u;
+}
\ No newline at end of file