diff --git a/crates/ghostty-config/src/config.rs b/crates/ghostty-config/src/config.rs
index 3cefeda..7bf42c5 100644
--- a/crates/ghostty-config/src/config.rs
+++ b/crates/ghostty-config/src/config.rs
@@ -4594,7 +4594,9 @@ impl Config {
         // If we are missing either a command or home directory, we need
         // to look up defaults which is kind of expensive. We only do this
         // on desktop (and not in tests, like the Zig `builtin.is_test`).
-        if !cfg!(test) && (self.command.is_none() || wd == WorkingDirectory::Home) {
+        if !cfg!(any(test, target_arch = "wasm32"))
+            && (self.command.is_none() || wd == WorkingDirectory::Home)
+        {
             self.lookup_shell_defaults(probable_cli, &mut wd)?;
         }
         wd.finalize();
diff --git a/crates/ghostty-wasm/tests/node_test.js b/crates/ghostty-wasm/tests/node_test.js
index eee29b9..275b0c6 100644
--- a/crates/ghostty-wasm/tests/node_test.js
+++ b/crates/ghostty-wasm/tests/node_test.js
@@ -127,11 +127,12 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
   {
     const cfg = x.config_new();
     assert.ok(cfg);
-    const s = host.writeString('font-size = 18\nwindow-padding-x = 7\nnot-a-key = 1\n');
+    const s = host.writeString('font-size = 18\nwindow-padding-x = 7\nwindow-width = 1\nnot-a-key = 1\n');
     x.config_load_string(cfg, s.ptr, s.len);
     s.free();
     assert.strictEqual(x.config_diagnostics_count(cfg), 1);
     x.config_finalize(cfg);
+    assert.deepStrictEqual(logs, [], 'config finalization must succeed without desktop shell lookup');
     const cap = 1 << 16;
     const out = x.wasm_alloc(cap);
     const n = x.config_format(cfg, out, cap);
@@ -140,6 +141,8 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
     x.wasm_free(out, cap);
     assert.match(text, /font-size = 18/);
     assert.match(text, /window-padding-x = 7/);
+    // Width clamping happens after shell defaults: finalization must reach it.
+    assert.match(text, /window-width = 10\n/);
     x.config_free(cfg);
   }
 
@@ -202,10 +205,13 @@ const liveValues = (zigjs) => zigjs.values.slice(7).filter((v) => v !== null).le
   x.glyph_free(gg);
   assert.strictEqual(canvases[0].lastText.t, 'é');
 
-  // shaper_test prints through a terminal and logs the shaped runs
+  // shaper_test prints through a terminal and shapes its rows. The default
+  // errors-only logger suppresses the info records for those shaped runs.
   const st = host.writeString('hello é');
   x.shaper_test(sh, face, st.ptr, st.len);
-  assert.ok(logs.some((l) => l.startsWith('info(')), logs.join('\n'));
+  assert.deepStrictEqual(logs, [], 'shaper info logs must be suppressed');
+  assert.ok(x.shaper_shape(sh, face, outp, 16) > 0, 'shaper_test prepared a run');
+  assert.strictEqual(new Uint32Array(instance.exports.memory.buffer, outp, 2)[1], 0x68);
 
   // ---- deferred face ----
   const d = x.deferred_face_new(f.ptr, f.len, 0);
diff --git a/docs/rewrite/notes/wasm-W1.md b/docs/rewrite/notes/wasm-W1.md
index be040a2..0763d14 100644
--- a/docs/rewrite/notes/wasm-W1.md
+++ b/docs/rewrite/notes/wasm-W1.md
@@ -84,6 +84,9 @@ Differences/extras: `region_free`/`glyph_free` (Zig: "global free"),
 `config_diagnostics_count`, `ghostty_wasm_init`, `wasm_alloc/free`.
 `shaper_test` takes a `Face` (Zig takes a stale `GroupCache`) and prints into a
 `ghostty-terminal` Terminal.
+Config finalization skips desktop shell and home-directory lookup on wasm,
+matching Zig, but still applies normalization such as minimum window dimensions.
+The wasm logger forwards errors only, so `shaper_test` info records are suppressed.
 
 ## Deviations from the (stale) Zig web_canvas code
 - Zig refers to `Atlas.Format.rgba` and a 7-field `Metrics` that no longer
@@ -104,6 +107,8 @@ Differences/extras: `region_free`/`glyph_free` (Zig: "global free"),
   `target/wasm-test`) and runs `tests/node_test.js` under node with a fake
   canvas: config parse/finalize/format, atlas, face metrics/glyph_index/
   render, emoji presentation, shaper clustering, deferred face, debug canvas.
+  It checks that config finalization completes without errors and clamps window
+  dimensions, and that `shaper_test` prepares a run without emitting info logs.
   Skipped if node or the wasm32 target is missing.
 - Not ported: Zig tests in Atlas.Wasm (`toHostOwned`, stale).