diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d0d6371
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+* text=auto eol=lf
+*.png binary
diff --git a/tests/fixtures/emitter.mjs b/tests/fixtures/emitter.mjs
index 99a10b4..778f21d 100644
--- a/tests/fixtures/emitter.mjs
+++ b/tests/fixtures/emitter.mjs
@@ -2,5 +2,9 @@ console.log('{"method":"GET","path":"/test","status":200,"durationMs":3}');
 console.error('WARN: fixture warning');
 console.error('TypeError: fixture failure');
 console.error('    at fixture (emitter.mjs:3:1)');
-console.log('after error');
-process.exitCode = 7;
+// stdout and stderr are separate pipes, so give the parent time to read the
+// stderr lines before the stdout line that should flush the stack trace.
+setTimeout(() => {
+  console.log('after error');
+  process.exitCode = 7;
+}, 100);