diff --git a/crates/cli/src/bin/wasm-bindgen-test-runner/main.rs b/crates/cli/src/bin/wasm-bindgen-test-runner/main.rs
index 522f6310d80..4f5c57dab22 100644
--- a/crates/cli/src/bin/wasm-bindgen-test-runner/main.rs
+++ b/crates/cli/src/bin/wasm-bindgen-test-runner/main.rs
@@ -155,7 +155,7 @@ fn rmain() -> Result<(), Error> {
         &tmpdir,
         &args.collect::<Vec<_>>(),
         &tests,
-    )?;
+    ).context("failed to spawn server")?;
     let addr = srv.server_addr();
 
     // TODO: eventually we should provide the ability to exit at some point
diff --git a/crates/cli/src/bin/wasm-bindgen.rs b/crates/cli/src/bin/wasm-bindgen.rs
index d3ffdfedde4..2b0e240e4c2 100644
--- a/crates/cli/src/bin/wasm-bindgen.rs
+++ b/crates/cli/src/bin/wasm-bindgen.rs
@@ -5,6 +5,7 @@ extern crate docopt;
 extern crate wasm_bindgen_shared;
 #[macro_use]
 extern crate failure;
+extern crate env_logger;
 
 use std::path::PathBuf;
 use std::process;
@@ -59,6 +60,7 @@ struct Args {
 }
 
 fn main() {
+    env_logger::init();
     let args: Args = Docopt::new(USAGE)
         .and_then(|d| d.deserialize())
         .unwrap_or_else(|e| e.exit());