diff --git a/tests/javascript_tests.json b/tests/javascript_tests.json
index a2401b6..c95ccc2 100644
--- a/tests/javascript_tests.json
+++ b/tests/javascript_tests.json
@@ -38,7 +38,7 @@
                     {
                         "event_code": {
                             "HED": {
-                                "show": "Red,  Label/a \u00ca\u00b0 good"
+                                "show": "Red,  Label/a-\u00ca\u00b0-good"
                             }
                         }
                     }
@@ -69,7 +69,7 @@
                         [
                             4.5,
                             0,
-                            "Label/Temp, Label/a \u00ca\u00b0 good"
+                            "Label/Temp, Label/a-\u00ca\u00b0-good"
                         ]
                     ]
                 ]
@@ -6216,7 +6216,10 @@
     },
     {
         "error_code": "TAG_EXTENSION_INVALID",
-        "alt_codes": [],
+        "alt_codes": [
+            "CHARACTER_INVALID",
+            "PLACEHOLDER_INVALID"
+        ],
         "name": "tag-extension-invalid-bad-node-name",
         "description": "A tag extension term does not comply with rules for schema nodes.",
         "warning": false,
diff --git a/tests/json_tests/CHARACTER_INVALID.json b/tests/json_tests/CHARACTER_INVALID.json
index 0ce2c58..6a2449f 100644
--- a/tests/json_tests/CHARACTER_INVALID.json
+++ b/tests/json_tests/CHARACTER_INVALID.json
@@ -31,7 +31,7 @@
                     {
                         "event_code": {
                             "HED": {
-                                "show": "Red,  Label/a ʰ good"
+                                "show": "Red,  Label/a-ʰ-good"
                             }
                         }
                     }
@@ -47,7 +47,7 @@
                 "passes": [
                     [
                         ["onset", "duration", "HED"],
-                        [ 4.5, 0, "Label/Temp, Label/a ʰ good"]
+                        [ 4.5, 0, "Label/Temp, Label/a-ʰ-good"]
                     ]
                 ]
             },
diff --git a/tests/json_tests/TAG_EXTENSION_INVALID.json b/tests/json_tests/TAG_EXTENSION_INVALID.json
index 047e190..78491da 100644
--- a/tests/json_tests/TAG_EXTENSION_INVALID.json
+++ b/tests/json_tests/TAG_EXTENSION_INVALID.json
@@ -98,7 +98,7 @@
     },
     {
         "error_code": "TAG_EXTENSION_INVALID",
-        "alt_codes": [],
+        "alt_codes": ["CHARACTER_INVALID", "PLACEHOLDER_INVALID"],
         "name": "tag-extension-invalid-bad-node-name",
         "description": "A tag extension term does not comply with rules for schema nodes.",
         "warning": false,
diff --git a/tests/python_tests.json b/tests/python_tests.json
index 8e67ecd..ac9125f 100644
--- a/tests/python_tests.json
+++ b/tests/python_tests.json
@@ -38,7 +38,7 @@
                     {
                         "event_code": {
                             "HED": {
-                                "show": "Red,  Label/a \u00ca\u00b0 good"
+                                "show": "Red,  Label/a-\u00ca\u00b0-good"
                             }
                         }
                     }
@@ -69,7 +69,7 @@
                         [
                             4.5,
                             0,
-                            "Label/Temp, Label/a \u00ca\u00b0 good"
+                            "Label/Temp, Label/a-\u00ca\u00b0-good"
                         ]
                     ]
                 ]
@@ -9058,7 +9058,10 @@
     },
     {
         "error_code": "TAG_EXTENSION_INVALID",
-        "alt_codes": [],
+        "alt_codes": [
+            "CHARACTER_INVALID",
+            "PLACEHOLDER_INVALID"
+        ],
         "name": "tag-extension-invalid-bad-node-name",
         "description": "A tag extension term does not comply with rules for schema nodes.",
         "warning": false,