diff --git a/README.md b/README.md
index ffab3391..d46b8053 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Import JavaScript things into Rust and export Rust things to JavaScript.
 `src/lib.rs`:
 
 ```rust
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 use wasm_bindgen::prelude::*;
diff --git a/crates/backend/src/codegen.rs b/crates/backend/src/codegen.rs
index 09ee3ee7..78094d2a 100644
--- a/crates/backend/src/codegen.rs
+++ b/crates/backend/src/codegen.rs
@@ -148,7 +148,7 @@ impl ToTokens for ast::Struct {
                         unsafe { &mut ::wasm_bindgen::convert::GlobalStack::new() },
                     );
 
-                    #[wasm_import_module = "__wbindgen_placeholder__"]
+                    #[link(wasm_import_module = "__wbindgen_placeholder__")]
                     extern {
                         fn #new_fn(ptr: u32) -> u32;
                     }
@@ -784,7 +784,7 @@ impl ToTokens for ast::ImportFunction {
             #vis fn #rust_name(#me #(#arguments),*) #ret {
                 // See definition of `link_mem_intrinsics` for what this is doing
                 ::wasm_bindgen::__rt::link_mem_intrinsics();
-                #[wasm_import_module = "__wbindgen_placeholder__"]
+                #[link(wasm_import_module = "__wbindgen_placeholder__")]
                 extern {
                     fn #import_name(#(#abi_arguments),*) -> #abi_ret;
                 }
@@ -910,7 +910,7 @@ impl ToTokens for ast::ImportStatic {
             #vis static #name: ::wasm_bindgen::JsStatic<#ty> = {
                 #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
                 fn init() -> #ty {
-                    #[wasm_import_module = "__wbindgen_placeholder__"]
+                    #[link(wasm_import_module = "__wbindgen_placeholder__")]
                     extern {
                         fn #shim_name() -> <#ty as ::wasm_bindgen::convert::FromWasmAbi>::Abi;
                     }
diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index 7630dbbf..2886991f 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -17,7 +17,7 @@
 //! bindings.
 
 #![doc(html_root_url = "https://docs.rs/js-sys/0.2")]
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/crates/js-sys/tests/wasm/main.rs b/crates/js-sys/tests/wasm/main.rs
index 3ce1952d..203fdfa5 100644
--- a/crates/js-sys/tests/wasm/main.rs
+++ b/crates/js-sys/tests/wasm/main.rs
@@ -1,5 +1,5 @@
 #![cfg(target_arch = "wasm32")]
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 #![allow(non_snake_case)]
 
 extern crate js_sys;
diff --git a/crates/test/src/lib.rs b/crates/test/src/lib.rs
index afb93669..f0725975 100644
--- a/crates/test/src/lib.rs
+++ b/crates/test/src/lib.rs
@@ -2,7 +2,7 @@
 //!
 //! More documentation can be found in the README for this crate!
 
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen_test_macro;
 extern crate wasm_bindgen;
diff --git a/crates/web-sys/src/lib.rs b/crates/web-sys/src/lib.rs
index 758d9393..696d1fd2 100755
--- a/crates/web-sys/src/lib.rs
+++ b/crates/web-sys/src/lib.rs
@@ -1,4 +1,3 @@
-#![feature(wasm_import_module)]
 #![doc(html_root_url = "https://docs.rs/web-sys/0.2")]
 
 extern crate wasm_bindgen;
diff --git a/crates/web-sys/tests/all/headers.rs b/crates/web-sys/tests/all/headers.rs
index 3c4df56f..b8a7014e 100644
--- a/crates/web-sys/tests/all/headers.rs
+++ b/crates/web-sys/tests/all/headers.rs
@@ -6,7 +6,7 @@ fn headers() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
                 extern crate web_sys;
diff --git a/crates/webidl/tests/all/array.rs b/crates/webidl/tests/all/array.rs
index c299f681..c094882a 100644
--- a/crates/webidl/tests/all/array.rs
+++ b/crates/webidl/tests/all/array.rs
@@ -102,7 +102,7 @@ fn take_and_return_a_bunch_of_slices() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/crates/webidl/tests/all/consts.rs b/crates/webidl/tests/all/consts.rs
index 6a71953c..7f742435 100644
--- a/crates/webidl/tests/all/consts.rs
+++ b/crates/webidl/tests/all/consts.rs
@@ -24,7 +24,7 @@ fn bool() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -93,7 +93,7 @@ fn ints() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -160,7 +160,7 @@ fn floats() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
diff --git a/crates/webidl/tests/all/enums.rs b/crates/webidl/tests/all/enums.rs
index 2bc8457d..8af31dd5 100644
--- a/crates/webidl/tests/all/enums.rs
+++ b/crates/webidl/tests/all/enums.rs
@@ -39,7 +39,7 @@ fn top_level_enum() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/crates/webidl/tests/all/simple.rs b/crates/webidl/tests/all/simple.rs
index 58ed2beb..24de453a 100644
--- a/crates/webidl/tests/all/simple.rs
+++ b/crates/webidl/tests/all/simple.rs
@@ -29,7 +29,7 @@ fn method() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -87,7 +87,7 @@ fn property() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -149,7 +149,7 @@ fn named_constructor() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -198,7 +198,7 @@ fn static_method() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -251,7 +251,7 @@ fn static_property() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -303,7 +303,7 @@ fn one_method_using_an_undefined_import_doesnt_break_all_other_methods() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -348,7 +348,7 @@ fn unforgeable_is_structural() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -405,7 +405,7 @@ fn partial_interface() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -471,7 +471,7 @@ fn mixin() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
diff --git a/crates/webidl/tests/all/throws.rs b/crates/webidl/tests/all/throws.rs
index 6ec4021c..1be4d707 100644
--- a/crates/webidl/tests/all/throws.rs
+++ b/crates/webidl/tests/all/throws.rs
@@ -64,7 +64,7 @@ fn throws() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
diff --git a/examples/add/src/lib.rs b/examples/add/src/lib.rs
index b649f3f6..77a63744 100644
--- a/examples/add/src/lib.rs
+++ b/examples/add/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/asm.js/src/lib.rs b/examples/asm.js/src/lib.rs
index 30c3788e..c6ee4f47 100644
--- a/examples/asm.js/src/lib.rs
+++ b/examples/asm.js/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/char/src/lib.rs b/examples/char/src/lib.rs
index 84b84ae4..5682ae4c 100644
--- a/examples/char/src/lib.rs
+++ b/examples/char/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/closures/src/lib.rs b/examples/closures/src/lib.rs
index ac5a8f77..27ea2c24 100644
--- a/examples/closures/src/lib.rs
+++ b/examples/closures/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 extern crate js_sys;
diff --git a/examples/comments/src/lib.rs b/examples/comments/src/lib.rs
index 54518e97..cc416955 100644
--- a/examples/comments/src/lib.rs
+++ b/examples/comments/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/console_log/src/lib.rs b/examples/console_log/src/lib.rs
index 20c3fd47..5b652e71 100644
--- a/examples/console_log/src/lib.rs
+++ b/examples/console_log/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/dom/src/lib.rs b/examples/dom/src/lib.rs
index 2f3c8dfd..43d98f76 100644
--- a/examples/dom/src/lib.rs
+++ b/examples/dom/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/hello_world/src/lib.rs b/examples/hello_world/src/lib.rs
index b34ae6e3..41486fa4 100644
--- a/examples/hello_world/src/lib.rs
+++ b/examples/hello_world/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/import_js/src/lib.rs b/examples/import_js/src/lib.rs
index e3b7fa7c..5093db75 100644
--- a/examples/import_js/src/lib.rs
+++ b/examples/import_js/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/julia_set/src/lib.rs b/examples/julia_set/src/lib.rs
index c0b65777..2f7a00a9 100644
--- a/examples/julia_set/src/lib.rs
+++ b/examples/julia_set/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module, js_globals)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 use wasm_bindgen::prelude::*;
diff --git a/examples/math/src/lib.rs b/examples/math/src/lib.rs
index 78ec0569..35194922 100644
--- a/examples/math/src/lib.rs
+++ b/examples/math/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/no_modules/src/lib.rs b/examples/no_modules/src/lib.rs
index b34ae6e3..41486fa4 100644
--- a/examples/no_modules/src/lib.rs
+++ b/examples/no_modules/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/performance/src/lib.rs b/examples/performance/src/lib.rs
index f8061122..1598ed95 100644
--- a/examples/performance/src/lib.rs
+++ b/examples/performance/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate humantime;
 extern crate wasm_bindgen;
diff --git a/examples/smorgasboard/src/lib.rs b/examples/smorgasboard/src/lib.rs
index 3d5472d4..308f3390 100644
--- a/examples/smorgasboard/src/lib.rs
+++ b/examples/smorgasboard/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/examples/wasm-in-wasm/src/lib.rs b/examples/wasm-in-wasm/src/lib.rs
index 9f81fcbf..b2539293 100644
--- a/examples/wasm-in-wasm/src/lib.rs
+++ b/examples/wasm-in-wasm/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/guide/src/basic-usage.md b/guide/src/basic-usage.md
index 429192bf..8d8bb820 100644
--- a/guide/src/basic-usage.md
+++ b/guide/src/basic-usage.md
@@ -39,7 +39,7 @@ wasm-bindgen = "0.2"
 Next up our actual code! We'll write this in `src/lib.rs`:
 
 ```rust,ignore
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 use wasm_bindgen::prelude::*;
diff --git a/guide/src/what-else-can-we-do.md b/guide/src/what-else-can-we-do.md
index 18f16b96..61b65318 100644
--- a/guide/src/what-else-can-we-do.md
+++ b/guide/src/what-else-can-we-do.md
@@ -5,7 +5,7 @@ can also [explore this code online](https://webassembly.studio/?f=t61j18noqz):
 
 ```rust,ignore
 // src/lib.rs
-#![feature(use_extern_macros, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;
 
diff --git a/src/lib.rs b/src/lib.rs
index c241272f..3fedff5b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,7 +5,7 @@
 //! this crate and this crate also provides JS bindings through the `JsValue`
 //! interface.
 
-#![feature(use_extern_macros, wasm_import_module, unsize)]
+#![feature(use_extern_macros, unsize)]
 #![no_std]
 #![doc(html_root_url = "https://docs.rs/wasm-bindgen/0.2")]
 
@@ -368,7 +368,7 @@ numbers! { i8 u8 i16 u16 i32 u32 f32 f64 }
 macro_rules! externs {
     ($(fn $name:ident($($args:tt)*) -> $ret:ty;)*) => (
         #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
-        #[wasm_import_module = "__wbindgen_placeholder__"]
+        #[link(wasm_import_module = "__wbindgen_placeholder__")]
         extern {
             $(fn $name($($args)*) -> $ret;)*
         }
diff --git a/tests/all/api.rs b/tests/all/api.rs
index 1bfeccdd..6de2739f 100644
--- a/tests/all/api.rs
+++ b/tests/all/api.rs
@@ -201,7 +201,7 @@ fn null_keeps_working() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/char.rs b/tests/all/char.rs
index 4f280515..a8392fc0 100644
--- a/tests/all/char.rs
+++ b/tests/all/char.rs
@@ -6,7 +6,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/classes.rs b/tests/all/classes.rs
index f08cd706..f7434900 100644
--- a/tests/all/classes.rs
+++ b/tests/all/classes.rs
@@ -6,7 +6,7 @@ fn simple() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -75,7 +75,7 @@ fn strings() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -139,7 +139,7 @@ fn exceptions() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -207,7 +207,7 @@ fn pass_one_to_another() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -263,7 +263,7 @@ fn pass_into_js() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -316,7 +316,7 @@ fn issue_27() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
             use wasm_bindgen::prelude::*;
@@ -365,7 +365,7 @@ fn pass_into_js_as_js_class() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -418,7 +418,7 @@ fn constructors() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -502,7 +502,7 @@ fn empty_structs() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -538,7 +538,7 @@ fn public_fields() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -597,7 +597,7 @@ fn using_self() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -635,7 +635,7 @@ fn readonly_fields() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -677,7 +677,7 @@ fn readonly_fields() {
 fn double_consume() {
     project()
         .file("src/lib.rs", r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -714,7 +714,7 @@ fn double_consume() {
 fn rename_function_for_js() {
     project()
         .file("src/lib.rs", r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/closures.rs b/tests/all/closures.rs
index 272725ba..36a16d4b 100644
--- a/tests/all/closures.rs
+++ b/tests/all/closures.rs
@@ -6,7 +6,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -56,7 +56,7 @@ fn cannot_reuse() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -105,7 +105,7 @@ fn long_lived() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -168,7 +168,7 @@ fn many_arity() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -269,7 +269,7 @@ fn long_lived_dropping() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -322,7 +322,7 @@ fn long_fnmut_recursive() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -369,7 +369,7 @@ fn fnmut() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -423,7 +423,7 @@ fn fnmut_bad() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -484,7 +484,7 @@ fn string_arguments() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -529,7 +529,7 @@ fn string_ret() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/comments.rs b/tests/all/comments.rs
index 4115ff09..474940cc 100644
--- a/tests/all/comments.rs
+++ b/tests/all/comments.rs
@@ -6,7 +6,7 @@ fn works() {
     p.file(
         "src/lib.rs",
         r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/dependencies.rs b/tests/all/dependencies.rs
index b076be9b..624ca000 100644
--- a/tests/all/dependencies.rs
+++ b/tests/all/dependencies.rs
@@ -6,7 +6,7 @@ fn dependencies_work() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 extern crate dependency;
                 use wasm_bindgen::prelude::*;
@@ -51,7 +51,7 @@ fn dependencies_work() {
         .file(
             "vendor/dependency/src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -97,7 +97,7 @@ fn same_api_two_crates() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 extern crate a;
                 extern crate b;
@@ -158,7 +158,7 @@ fn same_api_two_crates() {
         .file(
             "a/src/lib.rs",
             "
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
 
                 use wasm_bindgen::prelude::*;
@@ -190,7 +190,7 @@ fn same_api_two_crates() {
         .file(
             "b/src/lib.rs",
             "
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
 
                 use wasm_bindgen::prelude::*;
diff --git a/tests/all/import_class.rs b/tests/all/import_class.rs
index f07e1da7..2109048a 100644
--- a/tests/all/import_class.rs
+++ b/tests/all/import_class.rs
@@ -6,7 +6,7 @@ fn simple() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -52,7 +52,7 @@ fn import_class() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -104,7 +104,7 @@ fn construct() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -187,7 +187,7 @@ fn new_constructors() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -242,7 +242,7 @@ fn switch_methods() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -330,7 +330,7 @@ fn properties() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -396,7 +396,7 @@ fn rename_setter_getter() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -464,7 +464,7 @@ fn deny_missing_docs() {
             "src/lib.rs",
             r#"
                 //! dox
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 #![deny(missing_docs)]
                 #![allow(dead_code)]
 
@@ -512,7 +512,7 @@ fn options() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/imports.rs b/tests/all/imports.rs
index 84c3329d..eaa81043 100644
--- a/tests/all/imports.rs
+++ b/tests/all/imports.rs
@@ -6,7 +6,7 @@ fn simple() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -94,7 +94,7 @@ fn unused() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 #![allow(dead_code)]
 
                 extern crate wasm_bindgen;
@@ -131,7 +131,7 @@ fn string_ret() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -171,7 +171,7 @@ fn strings() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -218,7 +218,7 @@ fn exceptions() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -282,7 +282,7 @@ fn exn_caught() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -326,7 +326,7 @@ fn free_imports() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -363,7 +363,7 @@ fn import_a_field() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -401,7 +401,7 @@ fn rename() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -447,7 +447,7 @@ fn versions() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -496,7 +496,7 @@ fn underscore_pattern() {
     project()
         .debug(false)
         .file("src/lib.rs", r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -531,7 +531,7 @@ fn rust_keyword() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -573,7 +573,7 @@ fn rust_keyword2() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -614,7 +614,7 @@ fn custom_type() {
     project()
         .debug(false)
         .file("src/lib.rs", r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
@@ -677,7 +677,7 @@ fn unused_imports_not_generated() {
     project
         .debug(false)
         .file("src/lib.rs", r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/jsobjects.rs b/tests/all/jsobjects.rs
index 477e1243..c7c1e476 100644
--- a/tests/all/jsobjects.rs
+++ b/tests/all/jsobjects.rs
@@ -6,7 +6,7 @@ fn simple() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -53,7 +53,7 @@ fn owned() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -100,7 +100,7 @@ fn clone() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -153,7 +153,7 @@ fn promote() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -203,7 +203,7 @@ fn returning_vector() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -247,7 +247,7 @@ fn another_vector_return() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -290,7 +290,7 @@ fn serde() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
                 #[macro_use]
diff --git a/tests/all/node.rs b/tests/all/node.rs
index 9015d05e..7928c70c 100644
--- a/tests/all/node.rs
+++ b/tests/all/node.rs
@@ -8,7 +8,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/non_debug.rs b/tests/all/non_debug.rs
index d7742ef6..e43532da 100644
--- a/tests/all/non_debug.rs
+++ b/tests/all/non_debug.rs
@@ -7,7 +7,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/non_wasm.rs b/tests/all/non_wasm.rs
index 2a87b1d2..63099863 100644
--- a/tests/all/non_wasm.rs
+++ b/tests/all/non_wasm.rs
@@ -9,7 +9,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/simple.rs b/tests/all/simple.rs
index 1e7682b6..2243d044 100644
--- a/tests/all/simple.rs
+++ b/tests/all/simple.rs
@@ -269,7 +269,7 @@ fn no_std() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 #![no_std]
                 #![allow(dead_code)]
 
@@ -322,7 +322,7 @@ fn no_std_class() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 #![no_std]
                 #![allow(dead_code)]
 
@@ -375,7 +375,7 @@ fn jsvalue_typeof() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -420,7 +420,7 @@ fn binding_to_unimplemented_apis_doesnt_break_everything() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -454,7 +454,7 @@ fn optional_slices() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
+                #![feature(use_extern_macros, wasm_custom_section)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
diff --git a/tests/all/slice.rs b/tests/all/slice.rs
index 4e74a2f2..62c4bda4 100644
--- a/tests/all/slice.rs
+++ b/tests/all/slice.rs
@@ -92,7 +92,7 @@ fn import() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -247,7 +247,7 @@ fn pass_array_works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -303,7 +303,7 @@ fn import_mut() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
@@ -452,7 +452,7 @@ fn return_vec_ok() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
 
                 use wasm_bindgen::prelude::*;
diff --git a/tests/all/structural.rs b/tests/all/structural.rs
index db8d675d..b5f75350 100644
--- a/tests/all/structural.rs
+++ b/tests/all/structural.rs
@@ -6,7 +6,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
                 extern crate wasm_bindgen;
 
                 use wasm_bindgen::prelude::*;
diff --git a/tests/all/typescript.rs b/tests/all/typescript.rs
index a08aa333..4de44694 100644
--- a/tests/all/typescript.rs
+++ b/tests/all/typescript.rs
@@ -7,7 +7,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(use_extern_macros, wasm_import_module)]
+                #![feature(use_extern_macros)]
 
                 extern crate wasm_bindgen;
 
diff --git a/tests/all/u64.rs b/tests/all/u64.rs
index 41e46fc9..bff0dd78 100644
--- a/tests/all/u64.rs
+++ b/tests/all/u64.rs
@@ -7,7 +7,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
 
             extern crate wasm_bindgen;
 
diff --git a/tests/all/validate_prt.rs b/tests/all/validate_prt.rs
index 2e5e4fed..b0c6557b 100644
--- a/tests/all/validate_prt.rs
+++ b/tests/all/validate_prt.rs
@@ -6,7 +6,7 @@ fn works() {
         .file(
             "src/lib.rs",
             r#"
-            #![feature(use_extern_macros, wasm_import_module)]
+            #![feature(use_extern_macros)]
             extern crate wasm_bindgen;
             use wasm_bindgen::prelude::*;
             #[wasm_bindgen]