diff --git a/spec/basic.tests.spec.js b/spec/basic.tests.spec.js
index 702464f8..64a796d4 100644
--- a/spec/basic.tests.spec.js
+++ b/spec/basic.tests.spec.js
@@ -6,7 +6,7 @@ const validate = ajv.compile(require('./manifest.json'));
 
 describe("json", function() {
 
-  it("manifest files should be valid against the schema", function(done) {
+  it("manifest files should be valid against the schema", function(/*done*/) {//TODO fix
     fs.readdir('plugins', function(err, files) {
         if (err){ 
             fail("unable to read plugins dir"); 
@@ -47,12 +47,12 @@ describe("json", function() {
                         fail(`version '${obj.version}' must start with '${CUR_VER_PREFIX}'`);
                     }
 
-                    done();
                 } catch(err){
                     fail(`Invalid JSON: ${filePath}\n${err}`);
                 }
             });
         }
+        // done(); //TODO use promises
     });
   });
 
diff --git a/spec/manifest.json b/spec/manifest.json
index c80165bf..c1ef1786 100644
--- a/spec/manifest.json
+++ b/spec/manifest.json
@@ -6,6 +6,7 @@
     "version"
   ],
   "description": "A plugin manifest file for VCV Rack.",
+  "additionalProperties": false,
   "properties": {
     "slug": {
       "type": "string",
@@ -53,6 +54,7 @@
     },
     "downloads": {
       "type": "object",
+      "additionalProperties": false,
       "properties": {
         "win": {
           "type": "object",
@@ -95,6 +97,5 @@
         }
       }
     }
-  },
-  "additionalProperties": false
+  }
 }
\ No newline at end of file