diff --git a/ifj2017/test/loader.py b/ifj2017/test/loader.py
index ca90503..e8dcdd9 100644
--- a/ifj2017/test/loader.py
+++ b/ifj2017/test/loader.py
@@ -60,8 +60,20 @@ def _load_compact_tests(self, section_dir):
         extensions = tuple(data.get('extensions', ()))
         try:
             for i, test_case in enumerate(data.get('tests', ())):
-                name = test_case.get('name') or '{:03}'.format(i + 1)
-                code = test_case.get('code') or self._load_test_file(section_dir, name, 'code')
+                name = test_case.get('name')
+                code = test_case.get('code')
+
+                if name and code:
+                    TestLogger.log_warning(
+                        "Redefined test {} in file {}, skipping.".format(name, path.join(section_dir, 'tests.json'))
+                    )
+                    continue
+
+                if not name:
+                    name = '{:03}'.format(i + 1)
+                
+                if not code:
+                    code = self._load_test_file(section_dir, name, 'code')
 
                 cases.append(
                     TestInfo(
diff --git a/ifj2017/tests/01_basic/tests.json b/ifj2017/tests/01_basic/tests.json
index 60ff192..5207f96 100644
--- a/ifj2017/tests/01_basic/tests.json
+++ b/ifj2017/tests/01_basic/tests.json
@@ -19,32 +19,27 @@
       "stdout": "? Martin Kobelka napsal tento test"
     },
     {
-      "name": "13",
       "info": "Multi line string",
       "stdout": "ahoj\nsvete",
       "code": "scope \n print !\"ahoj\\nsvete\"; \nend scope"
     },
     {
-      "name": "14",
       "info": "Simple integer print",
       "stdout": " 42",
       "code": "scope \n print 42; \nend scope"
     },
     {
-      "name": "15",
       "info": "Simple double print",
       "stdout": " 5876.78",
       "code": "scope \n print 5876.78; \nend scope"
     },
     {
-      "name": "16",
       "info": "Simple input and print",
       "stdin": "42",
       "stdout": "?  42",
       "code": "scope \n dim a as integer \n input a \n print a; \nend scope"
     },
     {
-      "name": "17",
       "info": "Add two inputs",
       "stdin": "42\n24",
       "stdout": "? ?  66",
diff --git a/ifj2017/tests/02_functions/tests.json b/ifj2017/tests/02_functions/tests.json
index bb132a5..c0c0520 100644
--- a/ifj2017/tests/02_functions/tests.json
+++ b/ifj2017/tests/02_functions/tests.json
@@ -13,13 +13,11 @@
       "compiler_exit_code": 4
     },
     {
-      "name": "01",
       "info": "Asc value",
       "stdout": " 104",
       "code": "scope \n print asc(!\"ahoj\", 2); \n end scope"
     },
     {
-      "name": "02",
       "info": "Chr function",
       "stdout": "a",
       "code": "scope \n print chr(97); \n end scope"