diff --git a/app/cocal_methods.py b/app/cocal_methods.py
index 365210f4022eddd6d547dd22c7cc002d18257ad0..9e93f0593ffe0aa8df43d0d90959ea762dfd7dd6 100644
--- a/app/cocal_methods.py
+++ b/app/cocal_methods.py
@@ -156,13 +156,13 @@ class CocalMethods:
             soundfile.close()
 
     def upload_is_ready(self):
-        # return self.dut_path.exists()
-        return True
+        return self.dut_path.exists()
+        # return True
 
     def wait_for_user_upload(self, timeout=10):
         start = time.time()
         while not self.upload_is_ready():
-            time.wait(1)
+            time.sleep(1)
             if time.time() - start > timeout:
                 break
         return self.upload_is_ready()
@@ -313,7 +313,7 @@ class CocalMethods:
         return filter_tree
 
 
-    def generate_dcc(self):
+    def generate_dcc(self, perform_dcc_validation=False):
         if self.transfer_behavior:
             placeholder_dict = {
                 "PLACEHOLDER_GIT_HASH": self.get_current_git_hash(),
@@ -344,14 +344,15 @@ class CocalMethods:
             ET.indent(tree)
             tree.write(self.dcc_path, encoding="UTF-8", pretty_print=True, )
 
-            # validate against schema
-            dcc_schema_path = os.path.abspath(r"app/dcc/dcc.xsd")
-            try:
-                schema = xmlschema.XMLSchema(dcc_schema_path, validation="lax")  # strict (default) requires internet connection
-                result = schema.validate(self.dcc_path)
-                print(result)
-            except Exception as e:
-                print(f"Schema did not validate successfully. (Error: {e})")
+            # validate against schema (requires internet connection)
+            if perform_dcc_validation:
+                dcc_schema_path = os.path.abspath(r"app/dcc/dcc.xsd")
+                try:
+                    schema = xmlschema.XMLSchema(dcc_schema_path)
+                    result = schema.validate(self.dcc_path)
+                    print(result)
+                except Exception as e:
+                    print(f"Schema did not validate successfully. (Error: {e})")
 
         else:
             print("Can't generate DCC. No transfer behavior available.")