diff --git a/bin/generate-fixtures.js b/bin/generate-fixtures.js
index de0f1b7..c45ab00 100644
--- a/bin/generate-fixtures.js
+++ b/bin/generate-fixtures.js
@@ -11,33 +11,32 @@ const errorCb = (err) => {
 
 for (const suite of testSuites) {
   for (const request of Object.keys(suite.requests)) {
-    let content = {}
     const type = mime.contentType(request)
-    content = Object.assign(content, {
+    let content = {
       'Content-Type': type || null,
       'Content-Encoding': compressible(type) ? 'gzip' : null
-    })
+    }
     if (suite.default && suite.default.responseHeaders) {
       content = Object.assign(content, suite.default.responseHeaders)
     }
     if (suite.requests[request].responseHeaders) {
       content = Object.assign(content, suite.requests[request].responseHeaders)
     }
-    fs.outputFile(`fixtures/${request}`, JSON.stringify(content), errorCb)
+    fs.outputJsonSync(`fixtures/${request}`, content)
   }
 }
 
+fs.outputFile('fixtures/test.svgz', zlib.gzipSync(fs.readFileSync('fixtures/test.svgz')), errorCb)
+
 for (const folder of ['/', '.well-known/', '.well-known/test/']) {
-  fs.outputFile(`fixtures/${folder}.hidden_directory/test.html`, '', (err) => {
-    if (err) throw err
-  })
+  fs.outputFile(`fixtures/${folder}.hidden_directory/test.html`, '', errorCb)
 }
 
-fs.outputFile(`fixtures/test-pre-gzip.js.gz`, zlib.gzipSync(JSON.stringify({
+fs.outputFile('fixtures/test-pre-gzip.js.gz', zlib.gzipSync(JSON.stringify({
   'Content-Type': 'text/javascript; charset=utf-8',
   'Content-Encoding': 'gzip'
 })), errorCb)
-fs.outputFile(`fixtures/test-pre-gzip.js.br`, zlib.brotliCompressSync(JSON.stringify({
+fs.outputFile('fixtures/test-pre-gzip.js.br', zlib.brotliCompressSync(JSON.stringify({
   'Content-Type': 'text/javascript; charset=utf-8',
   'Content-Encoding': 'br'
 })), errorCb)