diff --git a/src/ast.ts b/src/ast.ts
index db0409b..7d65e48 100644
--- a/src/ast.ts
+++ b/src/ast.ts
@@ -77,7 +77,7 @@ export interface YAMLWithMark extends BaseYAMLNode {
     type: "YAMLWithMark"
     anchor: YAMLAnchor | null
     tag: YAMLTag | null
-    value: YAMLContent
+    value: YAMLContent | null
     parent: YAMLDocument | YAMLPair | YAMLSequence
 }
 
diff --git a/src/convert.ts b/src/convert.ts
index 9cf2ca8..5bde6b4 100644
--- a/src/convert.ts
+++ b/src/convert.ts
@@ -340,7 +340,7 @@ function convertMapping(
     for (const n of node.children) {
         ast.pairs.push(convertMappingItem(n, tokens, code, ast, doc))
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -364,7 +364,7 @@ function convertFlowMapping(
     for (const n of node.children) {
         ast.pairs.push(convertMappingItem(n, tokens, code, ast, doc))
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -443,7 +443,7 @@ function convertSequence(
     for (const n of node.children) {
         ast.entries.push(...convertSequenceItem(n, tokens, code, ast, doc))
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -481,7 +481,7 @@ function convertFlowSequence(
             ast.entries.push(map)
         }
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -510,40 +510,52 @@ function convertPlain(
     doc: YAMLDocument,
 ): YAMLPlainScalar | YAMLWithMark {
     const loc = getConvertLocation(node)
-    const strValue = node.value
-    let value: string | number | boolean | null
-
-    if (isTrue(strValue)) {
-        value = true
-    } else if (isFalse(strValue)) {
-        value = false
-    } else if (isNull(strValue)) {
-        value = null
-    } else if (needParse(strValue)) {
-        value = yaml.parse(strValue) || strValue
-    } else {
-        value = strValue
-    }
-    const ast: YAMLPlainScalar = {
-        type: "YAMLScalar",
-        style: "plain",
-        strValue,
-        value,
-        parent,
-        ...loc,
-    }
+    if (loc.range[0] < loc.range[1]) {
+        const strValue = node.value
+        let value: string | number | boolean | null
 
-    const type = typeof value
-    if (type === "boolean") {
-        addToken(tokens, "Boolean", clone(loc), code)
-    } else if (type === "number" && isFinite(Number(value))) {
-        addToken(tokens, "Numeric", clone(loc), code)
-    } else if (value === null) {
-        addToken(tokens, "Null", clone(loc), code)
-    } else {
-        addToken(tokens, "Identifier", clone(loc), code)
+        if (isTrue(strValue)) {
+            value = true
+        } else if (isFalse(strValue)) {
+            value = false
+        } else if (isNull(strValue)) {
+            value = null
+        } else if (needParse(strValue)) {
+            value = yaml.parse(strValue) || strValue
+        } else {
+            value = strValue
+        }
+        const ast: YAMLPlainScalar = {
+            type: "YAMLScalar",
+            style: "plain",
+            strValue,
+            value,
+            parent,
+            ...loc,
+        }
+
+        const type = typeof value
+        if (type === "boolean") {
+            addToken(tokens, "Boolean", clone(loc), code)
+        } else if (type === "number" && isFinite(Number(value))) {
+            addToken(tokens, "Numeric", clone(loc), code)
+        } else if (value === null) {
+            addToken(tokens, "Null", clone(loc), code)
+        } else {
+            addToken(tokens, "Identifier", clone(loc), code)
+        }
+        return convertAnchorAndTag(node, tokens, code, parent, ast, doc, loc)
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+
+    return convertAnchorAndTag<YAMLPlainScalar>(
+        node,
+        tokens,
+        code,
+        parent,
+        null,
+        doc,
+        loc,
+    )
 
     /**
      * Checks if the given string needs to be parsed
@@ -592,7 +604,7 @@ function convertQuoteDouble(
         ...loc,
     }
     addToken(tokens, "String", clone(loc), code)
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -617,7 +629,7 @@ function convertQuoteSingle(
         ...loc,
     }
     addToken(tokens, "String", clone(loc), code)
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -698,7 +710,7 @@ function convertBlockLiteral(
         // ??
         addToken(tokens, "BlockLiteral", clone(loc), code)
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -779,7 +791,7 @@ function convertBlockFolded(
         // ??
         addToken(tokens, "BlockFolded", clone(loc), code)
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -825,7 +837,7 @@ function convertAlias(
         // ??
         addToken(tokens, "Identifier", clone(loc), code)
     }
-    return convertAnchorAndTag(node, tokens, code, parent, ast, doc)
+    return convertAnchorAndTag(node, tokens, code, parent, ast, doc, ast)
 }
 
 /**
@@ -836,8 +848,9 @@ function convertAnchorAndTag<V extends YAMLContent>(
     tokens: Token[],
     code: string,
     parent: YAMLDocument | YAMLPair | YAMLSequence,
-    value: V,
+    value: V | null,
     doc: YAMLDocument,
+    valueLoc: Locations,
 ): YAMLWithMark | V {
     if (node.anchor || node.tag) {
         const ast: YAMLWithMark = {
@@ -846,10 +859,12 @@ function convertAnchorAndTag<V extends YAMLContent>(
             tag: null,
             value,
             parent,
-            range: clone(value.range),
-            loc: clone(value.loc),
+            range: clone(valueLoc.range),
+            loc: clone(valueLoc.loc),
+        }
+        if (value) {
+            value.parent = ast
         }
-        value.parent = ast
 
         if (node.anchor) {
             const anchor = convertAnchor(node.anchor, tokens, code, ast, doc)
@@ -868,7 +883,7 @@ function convertAnchorAndTag<V extends YAMLContent>(
         return ast
     }
 
-    return value
+    return value as any
 }
 
 /**
diff --git a/src/utils.ts b/src/utils.ts
index bfc2a0b..9dddeb2 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -91,6 +91,9 @@ const resolver = {
     },
     YAMLWithMark(node: YAMLWithMark) {
         if (node.tag) {
+            if (node.value == null) {
+                return getTaggedValue(node.tag, "", "")
+            }
             if (node.value.type === "YAMLScalar") {
                 if (node.value.style === "plain") {
                     return getTaggedValue(
@@ -111,6 +114,9 @@ const resolver = {
                 }
             }
         }
+        if (node.value == null) {
+            return null
+        }
         return getStaticYAMLValue(node.value)
     },
 }
diff --git a/tests/fixtures/parser/yaml-test-suite/FH7J-output.json b/tests/fixtures/parser/yaml-test-suite/FH7J-output.json
index 3173cf1..3cea2cc 100644
--- a/tests/fixtures/parser/yaml-test-suite/FH7J-output.json
+++ b/tests/fixtures/parser/yaml-test-suite/FH7J-output.json
@@ -29,26 +29,7 @@
                 }
               }
             },
-            "value": {
-              "type": "YAMLScalar",
-              "style": "plain",
-              "strValue": "",
-              "value": "",
-              "range": [
-                7,
-                7
-              ],
-              "loc": {
-                "start": {
-                  "line": 1,
-                  "column": 7
-                },
-                "end": {
-                  "line": 1,
-                  "column": 7
-                }
-              }
-            },
+            "value": null,
             "range": [
               2,
               7
@@ -91,26 +72,7 @@
                       }
                     }
                   },
-                  "value": {
-                    "type": "YAMLScalar",
-                    "style": "plain",
-                    "strValue": "",
-                    "value": "",
-                    "range": [
-                      18,
-                      18
-                    ],
-                    "loc": {
-                      "start": {
-                        "line": 3,
-                        "column": 8
-                      },
-                      "end": {
-                        "line": 3,
-                        "column": 8
-                      }
-                    }
-                  },
+                  "value": null,
                   "range": [
                     12,
                     18
@@ -204,26 +166,7 @@
                       }
                     }
                   },
-                  "value": {
-                    "type": "YAMLScalar",
-                    "style": "plain",
-                    "strValue": "",
-                    "value": "",
-                    "range": [
-                      33,
-                      33
-                    ],
-                    "loc": {
-                      "start": {
-                        "line": 4,
-                        "column": 10
-                      },
-                      "end": {
-                        "line": 4,
-                        "column": 10
-                      }
-                    }
-                  },
+                  "value": null,
                   "range": [
                     28,
                     33
@@ -297,26 +240,7 @@
                       }
                     }
                   },
-                  "value": {
-                    "type": "YAMLScalar",
-                    "style": "plain",
-                    "strValue": "",
-                    "value": "",
-                    "range": [
-                      41,
-                      41
-                    ],
-                    "loc": {
-                      "start": {
-                        "line": 5,
-                        "column": 7
-                      },
-                      "end": {
-                        "line": 5,
-                        "column": 7
-                      }
-                    }
-                  },
+                  "value": null,
                   "range": [
                     36,
                     41
@@ -353,26 +277,7 @@
                       }
                     }
                   },
-                  "value": {
-                    "type": "YAMLScalar",
-                    "style": "plain",
-                    "strValue": "",
-                    "value": "",
-                    "range": [
-                      50,
-                      50
-                    ],
-                    "loc": {
-                      "start": {
-                        "line": 5,
-                        "column": 16
-                      },
-                      "end": {
-                        "line": 5,
-                        "column": 16
-                      }
-                    }
-                  },
+                  "value": null,
                   "range": [
                     44,
                     50
@@ -508,24 +413,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        7,
-        7
-      ],
-      "loc": {
-        "start": {
-          "line": 1,
-          "column": 7
-        },
-        "end": {
-          "line": 1,
-          "column": 7
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": "-",
@@ -580,24 +467,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        18,
-        18
-      ],
-      "loc": {
-        "start": {
-          "line": 3,
-          "column": 8
-        },
-        "end": {
-          "line": 3,
-          "column": 8
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": ":",
@@ -706,24 +575,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        33,
-        33
-      ],
-      "loc": {
-        "start": {
-          "line": 4,
-          "column": 10
-        },
-        "end": {
-          "line": 4,
-          "column": 10
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": "-",
@@ -778,24 +629,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        41,
-        41
-      ],
-      "loc": {
-        "start": {
-          "line": 5,
-          "column": 7
-        },
-        "end": {
-          "line": 5,
-          "column": 7
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": ":",
@@ -849,24 +682,6 @@
           "column": 16
         }
       }
-    },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        50,
-        50
-      ],
-      "loc": {
-        "start": {
-          "line": 5,
-          "column": 16
-        },
-        "end": {
-          "line": 5,
-          "column": 16
-        }
-      }
     }
   ],
   "range": [
diff --git a/tests/fixtures/parser/yaml-test-suite/LE5A-output.json b/tests/fixtures/parser/yaml-test-suite/LE5A-output.json
index 03ec775..58ff418 100644
--- a/tests/fixtures/parser/yaml-test-suite/LE5A-output.json
+++ b/tests/fixtures/parser/yaml-test-suite/LE5A-output.json
@@ -182,26 +182,7 @@
                 }
               }
             },
-            "value": {
-              "type": "YAMLScalar",
-              "style": "plain",
-              "strValue": "",
-              "value": "",
-              "range": [
-                49,
-                49
-              ],
-              "loc": {
-                "start": {
-                  "line": 5,
-                  "column": 7
-                },
-                "end": {
-                  "line": 5,
-                  "column": 7
-                }
-              }
-            },
+            "value": null,
             "range": [
               44,
               49
@@ -539,24 +520,6 @@
           "column": 7
         }
       }
-    },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        49,
-        49
-      ],
-      "loc": {
-        "start": {
-          "line": 5,
-          "column": 7
-        },
-        "end": {
-          "line": 5,
-          "column": 7
-        }
-      }
     }
   ],
   "range": [
diff --git a/tests/fixtures/parser/yaml-test-suite/WZ62-output.json b/tests/fixtures/parser/yaml-test-suite/WZ62-output.json
index 978a7d0..d8eb1f3 100644
--- a/tests/fixtures/parser/yaml-test-suite/WZ62-output.json
+++ b/tests/fixtures/parser/yaml-test-suite/WZ62-output.json
@@ -51,26 +51,7 @@
                   }
                 }
               },
-              "value": {
-                "type": "YAMLScalar",
-                "style": "plain",
-                "strValue": "",
-                "value": "",
-                "range": [
-                  15,
-                  15
-                ],
-                "loc": {
-                  "start": {
-                    "line": 2,
-                    "column": 13
-                  },
-                  "end": {
-                    "line": 2,
-                    "column": 13
-                  }
-                }
-              },
+              "value": null,
               "range": [
                 10,
                 15
@@ -124,26 +105,7 @@
                   }
                 }
               },
-              "value": {
-                "type": "YAMLScalar",
-                "style": "plain",
-                "strValue": "",
-                "value": "",
-                "range": [
-                  24,
-                  24
-                ],
-                "loc": {
-                  "start": {
-                    "line": 3,
-                    "column": 7
-                  },
-                  "end": {
-                    "line": 3,
-                    "column": 7
-                  }
-                }
-              },
+              "value": null,
               "range": [
                 19,
                 24
@@ -319,24 +281,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        15,
-        15
-      ],
-      "loc": {
-        "start": {
-          "line": 2,
-          "column": 13
-        },
-        "end": {
-          "line": 2,
-          "column": 13
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": ",",
@@ -391,24 +335,6 @@
         }
       }
     },
-    {
-      "type": "Identifier",
-      "value": "",
-      "range": [
-        24,
-        24
-      ],
-      "loc": {
-        "start": {
-          "line": 3,
-          "column": 7
-        },
-        "end": {
-          "line": 3,
-          "column": 7
-        }
-      }
-    },
     {
       "type": "Punctuator",
       "value": ":",