diff --git a/test/driver.js b/test/driver.js
index 06d5644..012184a 100644
--- a/test/driver.js
+++ b/test/driver.js
@@ -1,13 +1,53 @@
 var tests = [];
+var ntests = 0;
+var fs = require("fs");
 
 exports.test = function(code, ast, options) {
-  tests.push({code: code, ast: ast, options: options});
+  var testName = "test" + (ntests++);
+  fs.writeFileSync(testName + ".js", code);
+  if (options && options.plugins && options.plugins.jsx)
+    fs.writeFileSync(testName + ".options.json", JSON.stringify(options.plugins.jsx, null, 2));
+  fs.writeFileSync(testName + ".ast", JSON.stringify(ast, function(k, v) {
+    if (v && typeof v === 'object') {
+      if (v.range) {
+        v.start = v.range[0];
+        v.end = v.range[1];
+        delete v.range;
+      }
+
+      if (typeof v.start === 'number') {
+        v.loc = v.loc || {};
+        v.loc.start = v.loc.start || {};
+        v.loc.start.offset = v.start;
+        delete v.start;
+      }
+
+      if (typeof v.end === 'number') {
+        v.loc = v.loc || {};
+        v.loc.end = v.loc.end || {};
+        v.loc.end.offset = v.end;
+        delete v.end;
+      }
+    }
+
+    if (v instanceof RegExp)
+      return v.toString();
+
+    return v;
+  }, 2));
+  //tests.push({code: code, ast: ast, options: options});
 };
 exports.testFail = function(code, message, options) {
-  tests.push({code: code, error: message, options: options});
+  var testName = "test" + (ntests++);
+  fs.writeFileSync(testName + ".js", code);
+  if (options && options.plugins && options.plugins.jsx)
+    fs.writeFileSync(testName + ".options.json", JSON.stringify(options.plugins.jsx, null, 2));
+  fs.writeFileSync(testName + ".fail", message);
+//  tests.push({code: code, error: message, options: options});
 };
 exports.testAssert = function(code, assert, options) {
-  tests.push({code: code, assert: assert, options: options});
+  throw new Error("Cannot handle tests with explicit assertions.");
+//  tests.push({code: code, assert: assert, options: options});
 };
 
 exports.runTests = function(config, callback) {