diff --git a/tests/cases/mime-groups.json b/tests/cases/mime-groups.json
index db799da..7af21ea 100644
--- a/tests/cases/mime-groups.json
+++ b/tests/cases/mime-groups.json
@@ -1,13 +1,10 @@
 [
-    {"input": "image/png",                         "groups": ["image"]},
+    {"input": "x/x",                               "groups": []},
     {"input": "image/x",                           "groups": ["image"]},
-    {"input": "audio/mp4",                         "groups": ["audio or video"]},
-    {"input": "video/mpeg",                        "groups": ["audio or video"]},
     {"input": "audio/x",                           "groups": ["audio or video"]},
     {"input": "video/x",                           "groups": ["audio or video"]},
     {"input": "application/ogg",                   "groups": ["audio or video"]},
     {"input": "application/ogg;x=x",               "groups": ["audio or video"]},
-    {"input": "font/woff",                         "groups": ["font"]},
     {"input": "font/x",                            "groups": ["font"]},
     {"input": "application/font-cff",              "groups": ["font"]},
     {"input": "application/font-cff;x=x",          "groups": ["font"]},
@@ -89,8 +86,6 @@
     {"input": "application/json;x=x",              "groups": ["JSON"]},
     {"input": "text/json",                         "groups": ["JSON"]},
     {"input": "text/json;x=x",                     "groups": ["JSON"]},
-    "Sanity check",
-    {"input": "x/x",                               "groups": []},
     {"input": "x/x;type=image",                    "groups": []},
     {"input": "x/x;type=audio",                    "groups": []},
     {"input": "x/x;type=video",                    "groups": []},
@@ -144,6 +139,10 @@
     {"input": "x+json/x",                          "groups": []},
     {"input": "x/x;x=x+json",                      "groups": []},
     {"input": "x/x;subtype=x+json",                "groups": []},
+    {"input": "image/png",                         "groups": ["image"]},
+    {"input": "audio/mp4",                         "groups": ["audio or video"]},
+    {"input": "video/mpeg",                        "groups": ["audio or video"]},
+    {"input": "font/woff",                         "groups": ["font"]},
     "SVG is both image and XML, thus also scriptable",
     {"input": "image/svg+xml",                     "groups": ["image", "XML", "scriptable"]},
     "Hypothetical SVG font type",