diff --git a/duper/src/parser/mod.rs b/duper/src/parser/mod.rs
--- a/duper/src/parser/mod.rs
+++ b/duper/src/parser/mod.rs
@@ -714,6 +714,10 @@
         let duper = DuperParser::parse_duper_value(input).unwrap();
         assert!(matches!(duper, DuperValue::String { .. }));
 
+        let input = r#""//""#;
+        let duper = DuperParser::parse_duper_value(input).unwrap();
+        assert!(matches!(duper, DuperValue::String { .. }));
+
         let input = r#"
             b"\x1b\t\x00"
         "#;
@@ -1312,7 +1316,15 @@
         "#;
         assert!(DuperParser::parse_duper_value(input).is_err());
         let input = r#"
+            [1,,2]
+        "#;
+        assert!(DuperParser::parse_duper_value(input).is_err());
+        let input = r#"
             (,,)
+        "#;
+        assert!(DuperParser::parse_duper_value(input).is_err());
+        let input = r#"
+            (1,,2)
         "#;
         assert!(DuperParser::parse_duper_value(input).is_err());
 
diff --git a/tree-sitter-duper/test/corpus/arrays.txt b/tree-sitter-duper/test/corpus/arrays.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/arrays.txt
@@ -0,0 +1,28 @@
+==================
+Empty
+==================
+
+[]
+
+---
+
+(duper_value
+  (array))
+
+==================
+Mixed values array
+==================
+
+[1, 2.2, []]
+
+---
+
+(duper_value
+  (array
+    (duper_value
+      (integer
+        (decimal_integer)))
+    (duper_value
+      (float))
+    (duper_value
+      (array))))
diff --git a/tree-sitter-duper/test/corpus/bytes.txt b/tree-sitter-duper/test/corpus/bytes.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/bytes.txt
@@ -0,0 +1,40 @@
+==================
+Quoted bytes
+==================
+
+b"\x1b\t\x00"
+
+---
+
+(duper_value
+  (bytes
+    (quoted_bytes
+      (quoted_content))))
+
+==================
+Raw bytes
+==================
+
+br"¯\_(ツ)_/¯"
+
+---
+
+(duper_value
+  (bytes
+    (raw_bytes
+      (raw_start)
+      (raw_content)
+      (raw_end))))
+
+==================
+Base64 bytes
+==================
+
+b64"RHVwZXI"
+
+---
+
+(duper_value
+  (bytes
+    (base64_bytes
+      (base64_content))))
diff --git a/tree-sitter-duper/test/corpus/comments.txt b/tree-sitter-duper/test/corpus/comments.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/comments.txt
@@ -0,0 +1,30 @@
+==================
+Line comment before
+==================
+
+// Line comment
+12_000
+
+---
+
+(duper_value
+  (line_comment)
+  (integer
+    (decimal_integer)))
+
+==================
+Block comment after
+==================
+
+"foo"
+/*
+  Block comment
+*/
+
+---
+
+(duper_value
+  (string
+    (quoted_string
+      (quoted_content)))
+  (block_comment))
\ No newline at end of file
diff --git a/tree-sitter-duper/test/corpus/errors.txt b/tree-sitter-duper/test/corpus/errors.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/errors.txt
@@ -0,0 +1,893 @@
+==================
+Line comment
+:error
+==================
+
+// Only a line comment
+
+---
+
+==================
+Block comment
+:error
+==================
+
+/*
+  Only a multiline comment
+*/
+
+---
+
+==================
+Unclosed string
+:error
+==================
+
+"unclosed
+
+---
+
+==================
+Unopened string
+:error
+==================
+
+unopened"
+
+---
+
+==================
+Unclosed bytes
+:error
+==================
+
+b"unclosed bytes
+
+---
+
+==================
+Unclosed raw string
+:error
+==================
+
+r"unclosed raw
+
+---
+
+==================
+Unclosed raw bytes
+:error
+==================
+
+br"unclosed raw bytes
+
+---
+
+==================
+Unknown escape sequence
+:error
+==================
+
+"\e"
+
+---
+
+==================
+Padding character in incorrect position
+:error
+==================
+
+b64"RHV=wZXI"
+
+---
+
+==================
+Invalid character
+:error
+==================
+
+b64"ABC-"
+
+---
+
+==================
+Plus sign
+:error
+==================
+
++
+
+---
+
+==================
+Minus sign
+:error
+==================
+
+-
+
+---
+
+==================
+No trailing zero
+:error
+==================
+
+01
+
+---
+
+==================
+Lone underscore
+:error
+==================
+
+_
+
+---
+
+==================
+Underscore at start
+:error
+==================
+
+_12
+
+---
+
+==================
+Underscore at end
+:error
+==================
+
+12_
+
+---
+
+==================
+Double underscore
+:error
+==================
+
+1__2
+
+---
+
+==================
+Invalid character in integer
+:error
+==================
+
+12f
+
+---
+
+==================
+Missing decimal
+:error
+==================
+
+12.
+
+---
+
+==================
+Missing exponent
+:error
+==================
+
+12e
+
+---
+
+==================
+Missing exponent with plus sign
+:error
+==================
+
+12e+
+
+---
+
+==================
+Missing exponent with minus sign
+:error
+==================
+
+12e-
+
+---
+
+==================
+Too many fractionals
+:error
+==================
+
+12.34.56
+
+---
+
+==================
+Too many exponents
+:error
+==================
+
+12e34e56
+
+---
+
+==================
+Invalid exponent character
+:error
+==================
+
+12.3a4
+
+---
+
+==================
+Missing integer part before exponent
+:error
+==================
+
+e10
+
+---
+
+==================
+Lone dot
+:error
+==================
+
+.
+
+---
+
+==================
+Missing integer part before negative fractional part
+:error
+==================
+
+-.5
+
+---
+
+==================
+Missing integer part before positive fractional part
+:error
+==================
+
++.5
+
+---
+
+==================
+Underscore before fractional dot
+:error
+==================
+
+_.123
+
+---
+
+==================
+Underscore after fractional dot
+:error
+==================
+
+12._34
+
+---
+
+==================
+Underscore after exponent character
+:error
+==================
+
+12e_34
+
+---
+
+==================
+Underscore after exponent sign
+:error
+==================
+
+12e+_34
+
+---
+
+==================
+Double underscore in integer part
+:error
+==================
+
+1__2.34
+
+---
+
+==================
+Double underscore in fractional part
+:error
+==================
+
+12.3__4
+
+---
+
+==================
+Double underscore in exponent
+:error
+==================
+
+12e3__4
+
+---
+
+==================
+Underscore after fractional part
+:error
+==================
+
+12.34_
+
+---
+
+==================
+Underscore after exponent
+:error
+==================
+
+12e34_
+
+---
+
+==================
+Missing exponent
+:error
+==================
+
+12e
+
+---
+
+==================
+Swapped fractional part and exponent
+:error
+==================
+
+12e3.4
+
+---
+
+==================
+Missing hexadecimal integer
+:error
+==================
+
+0x
+
+---
+
+==================
+Invalid hexadecimal digit
+:error
+==================
+
+0xg
+
+---
+
+==================
+Lone underscore in hexadecimal integer
+:error
+==================
+
+0x_
+
+---
+
+==================
+Underscore after hexadecimal integer
+:error
+==================
+
+0x1_
+
+---
+
+==================
+Underscore before hexadecimal integer
+:error
+==================
+
+0x_1
+
+---
+
+==================
+Fraction in hexadecimal integer
+:error
+==================
+
+0x1.2
+
+---
+
+==================
+Sign inside hexadecimal integer
+:error
+==================
+
+0x-1
+
+---
+
+==================
+Sign outside hexadecimal integer
+:error
+==================
+
+-0x1
+
+---
+
+==================
+Missing octal integer
+:error
+==================
+
+0o
+
+---
+
+==================
+Invalid octal digit
+:error
+==================
+
+0o8
+
+---
+
+==================
+Lone underscore in octal integer
+:error
+==================
+
+0o_
+
+---
+
+==================
+Underscore after octal integer
+:error
+==================
+
+0o1_
+
+---
+
+==================
+Underscore before octal integer
+:error
+==================
+
+0o_1
+
+---
+
+==================
+Fraction in octal integer
+:error
+==================
+
+0o1.2
+
+---
+
+==================
+Sign inside octal integer
+:error
+==================
+
+0o-1
+
+---
+
+==================
+Sign outside octal integer
+:error
+==================
+
+-0o1
+
+---
+
+
+==================
+Missing binary integer
+:error
+==================
+
+0b
+
+---
+
+==================
+Invalid binary digit
+:error
+==================
+
+0b2
+
+---
+
+==================
+Lone underscore in binary integer
+:error
+==================
+
+0b_
+
+---
+
+==================
+Underscore after binary integer
+:error
+==================
+
+0b1_
+
+---
+
+==================
+Underscore before binary integer
+:error
+==================
+
+0b_1
+
+---
+
+==================
+Fraction in binary integer
+:error
+==================
+
+0b1.1
+
+---
+
+==================
+Sign inside binary integer
+:error
+==================
+
+0b-1
+
+---
+
+==================
+Sign outside binary integer
+:error
+==================
+
+-0b1
+
+---
+
+==================
+Comma in empty object
+:error
+==================
+
+{,}
+
+---
+
+==================
+Double comma in empty object
+:error
+==================
+
+{,,}
+
+---
+
+==================
+Starting digit in plain key
+:error
+==================
+
+{1a: ""}
+
+---
+
+==================
+Starting hyphen in plain key
+:error
+==================
+
+{-a: ""}
+
+---
+
+==================
+Ending hyphen in plain key
+:error
+==================
+
+{a-: ""}
+
+---
+
+==================
+Ending underscore in plain key
+:error
+==================
+
+{a_: ""}
+
+---
+
+==================
+Consecutive hyphens in plain key
+:error
+==================
+
+{a--b: ""}
+
+---
+
+==================
+Consecutive underscores in plain key
+:error
+==================
+
+{a__b: ""}
+
+---
+
+==================
+Underscore followed by hyphen in plain key
+:error
+==================
+
+{a_-b: ""}
+
+---
+
+==================
+Hyphen followed by underscore in plain key
+:error
+==================
+
+{a-_b: ""}
+
+---
+
+==================
+Starting underscore followed by hyphen in plain key
+:error
+==================
+
+{_-a: ""}
+
+---
+
+==================
+Starting double underscored in plain key
+:error
+==================
+
+{__a: "no starting double underscore in key"}
+
+---
+
+==================
+Single underscore plain key
+:error
+==================
+
+{_: ""}
+
+---
+
+==================
+Byte string value as key
+:error
+==================
+
+{b"value as key": null}
+
+---
+
+==================
+Missing colon
+:error
+==================
+
+{"missing" "colon"}
+
+---
+
+==================
+Missing value
+:error
+==================
+
+{"missing_value"}
+
+---
+
+==================
+Double comma in empty array
+:error
+==================
+
+[,,]
+
+---
+
+==================
+Double comma in non-empty array
+:error
+==================
+
+[1,,2]
+
+---
+
+==================
+Double comma in empty tuple
+:error
+==================
+
+(,,)
+
+---
+
+==================
+Double comma in non-empty tuple
+:error
+==================
+
+(1,,2)
+
+---
+
+==================
+Unicode characters in identifier
+:error
+==================
+
+NoÜnicodeÇharacters({})
+
+---
+
+==================
+Starting number in identifier
+:error
+==================
+
+1NoStartingNumber({})
+
+---
+
+==================
+Starting lowercase in identifier
+:error
+==================
+
+noStartingLowercase({})
+
+---
+
+==================
+Space in identifier
+:error
+==================
+
+No Space({})
+
+---
+
+==================
+Starting hyphen in identifier
+:error
+==================
+
+-NoStartingHyphen({})
+
+---
+
+==================
+Starting underscore in identifier
+:error
+==================
+
+_NoStartingUnderscore({})
+
+---
+
+==================
+Ending hyphen in identifier
+:error
+==================
+
+NoEndingHyphen-({})
+
+---
+
+==================
+Ending underscore in identifier
+:error
+==================
+
+NoEndingUnderscore_({})
+
+---
+
+==================
+Hyphen then underscore in identifier
+:error
+==================
+
+No-_HyphenThenUnderscore({})
+
+---
+
+==================
+Underscore then hyphen in identifier
+:error
+==================
+
+No_-UnderscoreThenHyphen({})
+
+---
+
+==================
+Brackets for identifier
+:error
+==================
+
+NoParenthesis[]
+
+---
+
+==================
+Identifier without value
+:error
+==================
+
+NoValue()
+
+---
+
+==================
+Comma after value
+:error
+==================
+
+null,
+
+---
+
+==================
+Comma before value
+:error
+==================
+
+,null
+
+---
+
+==================
+Comma between values
+:error
+==================
+
+true,false
+
+---
diff --git a/tree-sitter-duper/test/corpus/floats.txt b/tree-sitter-duper/test/corpus/floats.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/floats.txt
@@ -0,0 +1,32 @@
+==================
+Only decimal
+==================
+
+3.14
+
+---
+
+(duper_value
+  (float))
+
+==================
+Only exponent
+==================
+
+12e-10
+
+---
+
+(duper_value
+  (float))
+
+==================
+Underscore separators
+==================
+
+1_2.3_4E5_6
+
+---
+
+(duper_value
+  (float))
\ No newline at end of file
diff --git a/tree-sitter-duper/test/corpus/integers.txt b/tree-sitter-duper/test/corpus/integers.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/integers.txt
@@ -0,0 +1,48 @@
+==================
+Decimal
+==================
+
++9001
+
+---
+
+(duper_value
+  (integer
+    (decimal_integer)))
+
+
+==================
+Hexadecimal
+==================
+
+0x2001
+
+---
+
+(duper_value
+  (integer
+    (hex_integer)))
+
+==================
+Octal
+==================
+
+0o755
+
+---
+
+(duper_value
+  (integer
+    (octal_integer)))
+
+==================
+Binary
+==================
+
+0b0101_0101
+
+---
+
+(duper_value
+  (integer
+    (binary_integer)))
diff --git a/tree-sitter-duper/test/corpus/keywords.txt b/tree-sitter-duper/test/corpus/keywords.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/keywords.txt
@@ -0,0 +1,32 @@
+==================
+True
+==================
+
+true
+
+---
+
+(duper_value
+  (boolean))
+
+==================
+False
+==================
+
+false
+
+---
+
+(duper_value
+  (boolean))
+
+==================
+Null value
+==================
+
+null
+
+---
+
+(duper_value
+  (null))
diff --git a/tree-sitter-duper/test/corpus/objects.txt b/tree-sitter-duper/test/corpus/objects.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/objects.txt
@@ -0,0 +1,118 @@
+==================
+Compact with Temporal
+==================
+
+{id:"5",http:Instant('2000-11-01T00:00:00-03:00')}
+
+---
+
+(duper_value
+  (object
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (string
+          (quoted_string
+            (quoted_content)))))
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (identified_value
+          (identifier)
+          (temporal
+            (temporal_content)))))))
+
+==================
+Weird formatting
+==================
+
+{duper: 1337, _123: b"bar", _a-b_c
+  :
+    true, "_": false, "": null}
+
+---
+
+(duper_value
+  (object
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (integer
+          (decimal_integer))))
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (bytes
+          (quoted_bytes
+            (quoted_content)))))
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (boolean)))
+    (object_entry
+      (object_key
+        (quoted_string
+          (quoted_content)))
+      (duper_value
+        (boolean)))
+    (object_entry
+      (object_key
+        (quoted_string
+          (quoted_content)))
+      (duper_value
+        (null)))))
+
+==================
+Commented entries
+==================
+
+{
+  name: "constant.other.temporal.duper",
+  begin: Regex("'"),
+  end: Regex("'"),
+  // patterns: [
+  //   {
+  //     match: Regex("."),
+  //   },
+  // ],
+}
+
+---
+
+(duper_value
+  (object
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (string
+          (quoted_string
+            (quoted_content)))))
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (identified_value
+          (identifier)
+          (string
+            (quoted_string
+              (quoted_content))))))
+    (object_entry
+      (object_key
+        (plain_key))
+      (duper_value
+        (identified_value
+          (identifier)
+          (string
+            (quoted_string
+              (quoted_content))))))
+    (line_comment)
+    (line_comment)
+    (line_comment)
+    (line_comment)
+    (line_comment)))
diff --git a/tree-sitter-duper/test/corpus/strings.txt b/tree-sitter-duper/test/corpus/strings.txt
--- a/tree-sitter-duper/test/corpus/strings.txt
+++ b/tree-sitter-duper/test/corpus/strings.txt
@@ -1,4 +1,33 @@
 ==================
+Basic string
+==================
+
+"hello"
+
+---
+
+(duper_value
+  (string
+    (quoted_string
+      (quoted_content))))
+
+==================
+Raw string
+==================
+
+r"I am
+powerful"
+
+---
+
+(duper_value
+  (string
+    (raw_string
+      (raw_start)
+      (raw_content)
+      (raw_end))))
+
+==================
 Two slashes in string
 ==================
 
diff --git a/tree-sitter-duper/test/corpus/temporal.txt b/tree-sitter-duper/test/corpus/temporal.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/temporal.txt
@@ -0,0 +1,39 @@
+==================
+Full extension
+==================
+
+ZonedDateTime('2022-02-28T11:06:00.092121729+08:00[Asia/Shanghai][u-ca=chinese]')
+
+---
+
+(duper_value
+  (identified_value
+    (identifier)
+    (temporal
+      (temporal_content))))
+
+==================
+Whitespace padding
+==================
+
+'  2022-02-28T03:06:00.092121729+02:00  '
+
+---
+
+(duper_value
+  (temporal
+    (temporal_content)))
+
+==================
+Unknown identifier
+==================
+
+UnknownIdent('--11-03')
+
+---
+
+(duper_value
+  (identified_value
+    (identifier)
+    (temporal
+      (temporal_content))))
diff --git a/tree-sitter-duper/test/corpus/tuples.txt b/tree-sitter-duper/test/corpus/tuples.txt
new file mode 100644
--- /dev/null
+++ b/tree-sitter-duper/test/corpus/tuples.txt
@@ -0,0 +1,37 @@
+==================
+Empty tuple
+==================
+
+(
+)
+
+---
+
+(duper_value
+  (tuple))
+
+==================
+Empty tuple with comma
+==================
+
+(,)
+
+---
+
+(duper_value
+  (tuple))
+
+==================
+Nested tuples with identifier
+==================
+
+Hi((()))
+
+---
+
+(duper_value
+  (identified_value
+    (identifier)
+    (tuple
+      (duper_value
+        (tuple)))))
\ No newline at end of file