diff --git a/src/test/compile-fail/integer-literal-suffix-inference.rs b/src/test/compile-fail/integer-literal-suffix-inference.rs
new file mode 100644
index 0000000000000..2e868e160fae0
--- /dev/null
+++ b/src/test/compile-fail/integer-literal-suffix-inference.rs
@@ -0,0 +1,91 @@
+// xfail-test
+fn main() {
+
+    // the smallest positive values that need these types
+    let a8: i8 = 8;
+    let a16: i16 = 128;
+    let a32: i32 = 32_768;
+    let a64: i64 = 2_147_483_648;
+
+    // the smallest negative values that need these types
+    let c8: i8 = -9;
+    let c16: i16 = -129;
+    let c32: i32 = -32_769;
+    let c64: i64 = -2_147_483_649;
+
+    fn id_i8(n: i8) -> i8 { n }
+    fn id_i16(n: i16) -> i16 { n }
+    fn id_i32(n: i32) -> i32 { n }
+    fn id_i64(n: i64) -> i64 { n }
+
+    // the smallest values that need these types
+    let b8: u8 = 16;
+    let b16: u16 = 256;
+    let b32: u32 = 65_536;
+    let b64: u64 = 4_294_967_296;
+
+    fn id_u8(n: u8) -> u8 { n }
+    fn id_u16(n: u16) -> u16 { n }
+    fn id_u32(n: u32) -> u32 { n }
+    fn id_u64(n: u64) -> u64 { n }
+
+    id_i8(a8); // ok
+    id_i8(a16); //! ERROR mismatched types: expected `i8` but found `i16`
+    id_i8(a32); //! ERROR mismatched types: expected `i8` but found `i32`
+    id_i8(a64); //! ERROR mismatched types: expected `i8` but found `i64`
+
+    id_i16(a8); //! ERROR mismatched types: expected `i16` but found `i8`
+    id_i16(a16); // ok
+    id_i16(a32); //! ERROR mismatched types: expected `i16` but found `i32`
+    id_i16(a64); //! ERROR mismatched types: expected `i16` but found `i64`
+
+    id_i32(a8); //! ERROR mismatched types: expected `i32` but found `i8`
+    id_i32(a16); //! ERROR mismatched types: expected `i32` but found `i16`
+    id_i32(a32); // ok
+    id_i32(a64); //! ERROR mismatched types: expected `i32` but found `i64`
+
+    id_i64(a8); //! ERROR mismatched types: expected `i64` but found `i8`
+    id_i64(a16); //! ERROR mismatched types: expected `i64` but found `i16`
+    id_i64(a32); //! ERROR mismatched types: expected `i64` but found `i32`
+    id_i64(a64); // ok
+
+    id_i8(c8); // ok
+    id_i8(c16); //! ERROR mismatched types: expected `i8` but found `i16`
+    id_i8(c32); //! ERROR mismatched types: expected `i8` but found `i32`
+    id_i8(c64); //! ERROR mismatched types: expected `i8` but found `i64`
+
+    id_i16(c8); //! ERROR mismatched types: expected `i16` but found `i8`
+    id_i16(c16); // ok
+    id_i16(c32); //! ERROR mismatched types: expected `i16` but found `i32`
+    id_i16(c64); //! ERROR mismatched types: expected `i16` but found `i64`
+
+    id_i32(c8); //! ERROR mismatched types: expected `i32` but found `i8`
+    id_i32(c16); //! ERROR mismatched types: expected `i32` but found `i16`
+    id_i32(c32); // ok
+    id_i32(c64); //! ERROR mismatched types: expected `i32` but found `i64`
+
+    id_i64(a8); //! ERROR mismatched types: expected `i64` but found `i8`
+    id_i64(a16); //! ERROR mismatched types: expected `i64` but found `i16`
+    id_i64(a32); //! ERROR mismatched types: expected `i64` but found `i32`
+    id_i64(a64); // ok
+
+    id_u8(b8); // ok
+    id_u8(b16); //! ERROR mismatched types: expected `u8` but found `u16`
+    id_u8(b32); //! ERROR mismatched types: expected `u8` but found `u32`
+    id_u8(b64); //! ERROR mismatched types: expected `u8` but found `u64`
+
+    id_u16(b8); //! ERROR mismatched types: expected `u16` but found `u8`
+    id_u16(b16); // ok
+    id_u16(b32); //! ERROR mismatched types: expected `u16` but found `u32`
+    id_u16(b64); //! ERROR mismatched types: expected `u16` but found `u64`
+
+    id_u32(b8); //! ERROR mismatched types: expected `u32` but found `u8`
+    id_u32(b16); //! ERROR mismatched types: expected `u32` but found `u16`
+    id_u32(b32); // ok
+    id_u32(b64); //! ERROR mismatched types: expected `u32` but found `u64`
+
+    id_u64(b8); //! ERROR mismatched types: expected `u64` but found `u8`
+    id_u64(b16); //! ERROR mismatched types: expected `u64` but found `u16`
+    id_u64(b32); //! ERROR mismatched types: expected `u64` but found `u32`
+    id_u64(b64); // ok
+}
diff --git a/src/test/run-pass/integer-literal-suffix-inference.rs b/src/test/run-pass/integer-literal-suffix-inference.rs
new file mode 100644
index 0000000000000..cc3b4cb150f80
--- /dev/null
+++ b/src/test/run-pass/integer-literal-suffix-inference.rs
@@ -0,0 +1,62 @@
+// xfail-test
+fn main() {
+
+    // The commented-out lines are ones that fail currently.  I'm
+    // working on figuring out why (#1425). -- lkuper
+
+    fn id_i8(n: i8) -> i8 { n }
+    fn id_i16(n: i16) -> i16 { n }
+    fn id_i32(n: i32) -> i32 { n }
+    fn id_i64(n: i64) -> i64 { n }
+
+    fn id_uint(n: uint) -> uint { n }
+    fn id_u8(n: u8) -> u8 { n }
+    fn id_u16(n: u16) -> u16 { n }
+    fn id_u32(n: u32) -> u32 { n }
+    fn id_u64(n: u64) -> u64 { n }
+
+    let _i: i8 = -128;
+    let j = -128;
+    // id_i8(j);
+    id_i8(-128);
+
+    let _i: i16 = -32_768;
+    let j = -32_768;
+    // id_i16(j);
+    id_i16(-32_768);
+
+    let _i: i32 = -2_147_483_648;
+    let j = -2_147_483_648;
+    // id_i32(j);
+    id_i32(-2_147_483_648);
+
+    let _i: i64 = -9_223_372_036_854_775_808;
+    let j = -9_223_372_036_854_775_808;
+    // id_i64(j);
+    id_i64(-9_223_372_036_854_775_808);
+
+    let _i: uint = 1;
+    let j = 1;
+    id_uint(j);
+    id_uint(1);
+
+    let _i: u8 = 255;
+    let j = 255;
+    id_u8(j);
+    id_u8(255);
+
+    let _i: u16 = 65_535;
+    let j = 65_535;
+    id_u16(j);
+    id_u16(65_535);
+
+    let _i: u32 = 4_294_967_295;
+    let j = 4_294_967_295;
+    id_u32(j);
+    id_u32(4_294_967_295);
+
+    let _i: u64 = 18_446_744_073_709_551_615;
+    let j = 18_446_744_073_709_551_615;
+    id_u64(j);
+    id_u64(18_446_744_073_709_551_615);
+}