diff --git a/spec/src/fixtures.rs b/spec/src/fixtures.rs
index b8648da..5cbf83f 100644
--- a/spec/src/fixtures.rs
+++ b/spec/src/fixtures.rs
@@ -8,4 +8,6 @@ macro_rules! run_test {
 }
 
 run_test!("i32", wasm_i32);
-run_test!("endianness", wasm_endianness);
\ No newline at end of file
+run_test!("endianness", wasm_endianness);
+run_test!("i64", wasm_i64);
+run_test!("forward", wasm_forward);
\ No newline at end of file
diff --git a/spec/src/run.rs b/spec/src/run.rs
index d39c12f..92d7d7d 100644
--- a/spec/src/run.rs
+++ b/spec/src/run.rs
@@ -78,7 +78,12 @@ pub fn spec(name: &str) {
         .output()
         .expect("Failed to execute process");
 
-    assert!(wast2wasm_output.status.success(), "wast2wasm terminated with error code");
+    if !wast2wasm_output.status.success() {
+        println!("wasm2wast error code: {}", wast2wasm_output.status);
+        println!("wasm2wast stdout: {}", String::from_utf8_lossy(&wast2wasm_output.stdout));
+        println!("wasm2wast stderr: {}", String::from_utf8_lossy(&wast2wasm_output.stderr));
+        panic!("wasm2wast exited with status {}", wast2wasm_output.status);
+    }
 
     let mut f = File::open(&json_spec_path)
         .expect(&format!("Failed to load json file {}", &json_spec_path.to_string_lossy()));
diff --git a/spec/wabt b/spec/wabt
index 7425bcc..1e5b546 160000
--- a/spec/wabt
+++ b/spec/wabt
@@ -1 +1 @@
-Subproject commit 7425bcc31e6516375391d18a62daee4c9f3502de
+Subproject commit 1e5b546c65e8fef609431e77b1b2434dbf162e6c