Fix stale tests.

Author: cristianoc

scripts/test.js

@@ -60,7 +60,12 @@ async function runTests() {
   }
 
   if (mochaTest) {
-    cp.execSync(rescript_exe, {
+    cp.execSync(`${rescript_exe} clean`, {
+      cwd: path.join(__dirname, "..", "tests/tests"),
+      stdio: [0, 1, 2],
+    });
+
+    cp.execSync(`${rescript_exe} build`, {
       cwd: path.join(__dirname, "..", "tests/tests"),
       stdio: [0, 1, 2],
     });