diff --git a/syntax.json b/syntax.json
index d1ed939..3cf4648 100644
--- a/syntax.json
+++ b/syntax.json
@@ -163,6 +163,22 @@
       }
     ]
   },
+  {
+    "language": "JSON with Comments",
+    "markers": [
+      {
+        "type": "line",
+        "pattern": "//"
+      },
+      {
+        "type": "block",
+        "pattern": {
+          "start": "/\\*",
+          "end": "\\*/"
+        }
+      }
+    ]
+  },
   {
     "language": "JSON5",
     "markers": [
diff --git a/tests/test_closed.diff b/tests/test_closed.diff
index d3bfd01..46b6617 100644
--- a/tests/test_closed.diff
+++ b/tests/test_closed.diff
@@ -278,6 +278,12 @@ index 525e25d..ba4e68d 100644
 -TODO: Create an issue for TODO
 --}
 -sum a b = a + b
+diff --git a/tests/config.jsonc b/tests/config.jsonc
+index 0000000..525e25d 100644
+--- a/tests/config.jsonc
++++ b/tests/config.jsonc
+@@ -0,0 +0,1 @@
+- // TODO: Delete this line from the codebase
 diff --git a/tests/config.json5 b/tests/config.json5
 index 0000000..525e25d 100644
 --- a/tests/config.json5
diff --git a/tests/test_new.diff b/tests/test_new.diff
index 292ae36..dea6434 100644
--- a/tests/test_new.diff
+++ b/tests/test_new.diff
@@ -292,6 +292,23 @@ index 0000000..525e25d
 +    #  This function should probably do something more interesting
 +    #  labels: help wanted
 +}
+diff --git a/tests/config.jsonc b/tests/config.jsonc
+new file mode 100644
+index 0000000..525e25d
+--- /dev/null
++++ b/tests/config.jsonc
+@@ -0,0 +0,11 @@
++{
++  "myConfig": [
++ /*
++   GitRepository where 'Git release/tag'
++   matches 'Helm' version
++ */
++ "itIsWonderful",
++ // TODO: Delete this line from the codebase
++ "butItHasSomePendingActivities"
++ ]
++}
 diff --git a/tests/config.json5 b/tests/config.json5
 new file mode 100644
 index 0000000..525e25d
diff --git a/tests/test_todo_parser.py b/tests/test_todo_parser.py
index b811be2..e76fe3e 100644
--- a/tests/test_todo_parser.py
+++ b/tests/test_todo_parser.py
@@ -34,8 +34,11 @@ def test_php_issues(self):
     def test_java_issues(self):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'java'), 2)
 
+    def test_json_with_comments_issues(self):
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 2)
+
     def test_json5_issues(self):
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 1)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 2)
 
     def test_ruby_issues(self):
         # Includes 2 tests for Crystal.
@@ -123,8 +126,11 @@ def test_tex_issues(self):
     def test_julia_issues(self):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'julia'), 2)
 
+    def test_json_with_comments_issues(self):
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 2)
+
     def test_json5_issues(self):
-        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 1)
+        self.assertEqual(count_issues_for_file_type(self.raw_issues, 'javascript'), 2)
 
     def test_autohotkey_issues(self):
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'autohotkey'), 1)