diff --git a/babel.config.js b/babel.config.js
index 110f711a89..e70ac5e721 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -177,7 +177,7 @@ module.exports = function (api) {
 
 // env vars from the cli are always strings, so !!ENV_VAR returns true for "false"
 function bool(value) {
-  return value && value === "false" && value === "0";
+  return value && value !== "false" && value !== "0";
 }
 
 // TODO(Babel 8) This polyfill is only needed for Node.js 6 and 8
diff --git a/packages/babel-parser/src/plugins/jsx/index.js b/packages/babel-parser/src/plugins/jsx/index.js
index 923223b976..a14adeffea 100644
--- a/packages/babel-parser/src/plugins/jsx/index.js
+++ b/packages/babel-parser/src/plugins/jsx/index.js
@@ -24,6 +24,8 @@ const JsxErrors = Object.freeze({
     "JSX attributes must only be assigned a non-empty expression",
   MissingClosingTagFragment: "Expected corresponding JSX closing tag for <>",
   MissingClosingTagElement: "Expected corresponding JSX closing tag for <%0>",
+  UnexpectedSequenceExpression:
+    "Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)?",
   UnsupportedJsxValue:
     "JSX value should be either an expression or a quoted JSX text",
   UnterminatedJsxContent: "Unterminated JSX contents",
@@ -344,9 +346,24 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       if (this.match(tt.braceR)) {
         node.expression = this.jsxParseEmptyExpression();
       } else {
-        node.expression = this.parseExpression();
+        const expression = this.parseExpression();
+
+        if (process.env.BABEL_8_BREAKING) {
+          if (
+            expression.type === "SequenceExpression" &&
+            !expression.extra?.parenthesized
+          ) {
+            this.raise(
+              expression.expressions[1].start,
+              JsxErrors.UnexpectedSequenceExpression,
+            );
+          }
+        }
+
+        node.expression = expression;
       }
       this.expect(tt.braceR);
+
       return this.finishNode(node, "JSXExpressionContainer");
     }
 
diff --git a/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/input.js b/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/input.js
new file mode 100644
index 0000000000..e5828b6334
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/input.js
@@ -0,0 +1 @@
+<div>{(console.log('foo'), JSON.stringify(props))}</div>
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/output.json b/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/output.json
new file mode 100644
index 0000000000..1afdb0d06d
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/basic/sequence-expression/output.json
@@ -0,0 +1,113 @@
+{
+  "type": "File",
+  "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [],
+            "selfClosing": false
+          },
+          "closingElement": {
+            "type": "JSXClosingElement",
+            "start":50,"end":56,"loc":{"start":{"line":1,"column":50},"end":{"line":1,"column":56}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":52,"end":55,"loc":{"start":{"line":1,"column":52},"end":{"line":1,"column":55}},
+              "name": "div"
+            }
+          },
+          "children": [
+            {
+              "type": "JSXExpressionContainer",
+              "start":5,"end":50,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":50}},
+              "expression": {
+                "type": "SequenceExpression",
+                "start":7,"end":48,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":48}},
+                "extra": {
+                  "parenthesized": true,
+                  "parenStart": 6
+                },
+                "expressions": [
+                  {
+                    "type": "CallExpression",
+                    "start":7,"end":25,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":25}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":7,"end":18,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":18}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":7,"end":14,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":14},"identifierName":"console"},
+                        "name": "console"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":15,"end":18,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":18},"identifierName":"log"},
+                        "name": "log"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "StringLiteral",
+                        "start":19,"end":24,"loc":{"start":{"line":1,"column":19},"end":{"line":1,"column":24}},
+                        "extra": {
+                          "rawValue": "foo",
+                          "raw": "'foo'"
+                        },
+                        "value": "foo"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "CallExpression",
+                    "start":27,"end":48,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":48}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":27,"end":41,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":41}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":27,"end":31,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":31},"identifierName":"JSON"},
+                        "name": "JSON"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":32,"end":41,"loc":{"start":{"line":1,"column":32},"end":{"line":1,"column":41},"identifierName":"stringify"},
+                        "name": "stringify"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "Identifier",
+                        "start":42,"end":47,"loc":{"start":{"line":1,"column":42},"end":{"line":1,"column":47},"identifierName":"props"},
+                        "name": "props"
+                      }
+                    ]
+                  }
+                ]
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/input.js b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/input.js
new file mode 100644
index 0000000000..90b46deab9
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/input.js
@@ -0,0 +1 @@
+<div key={console.log('foo'), JSON.stringify(props)} />
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/options.json b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/options.json
new file mode 100644
index 0000000000..29a3f0e841
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/options.json
@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/output.json b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/output.json
new file mode 100644
index 0000000000..9390806f51
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression-babel-7/output.json
@@ -0,0 +1,110 @@
+{
+  "type": "File",
+  "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [
+              {
+                "type": "JSXAttribute",
+                "start":5,"end":52,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":52}},
+                "name": {
+                  "type": "JSXIdentifier",
+                  "start":5,"end":8,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":8}},
+                  "name": "key"
+                },
+                "value": {
+                  "type": "JSXExpressionContainer",
+                  "start":9,"end":52,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":52}},
+                  "expression": {
+                    "type": "SequenceExpression",
+                    "start":10,"end":51,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":51}},
+                    "expressions": [
+                      {
+                        "type": "CallExpression",
+                        "start":10,"end":28,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":28}},
+                        "callee": {
+                          "type": "MemberExpression",
+                          "start":10,"end":21,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":21}},
+                          "object": {
+                            "type": "Identifier",
+                            "start":10,"end":17,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":17},"identifierName":"console"},
+                            "name": "console"
+                          },
+                          "computed": false,
+                          "property": {
+                            "type": "Identifier",
+                            "start":18,"end":21,"loc":{"start":{"line":1,"column":18},"end":{"line":1,"column":21},"identifierName":"log"},
+                            "name": "log"
+                          }
+                        },
+                        "arguments": [
+                          {
+                            "type": "StringLiteral",
+                            "start":22,"end":27,"loc":{"start":{"line":1,"column":22},"end":{"line":1,"column":27}},
+                            "extra": {
+                              "rawValue": "foo",
+                              "raw": "'foo'"
+                            },
+                            "value": "foo"
+                          }
+                        ]
+                      },
+                      {
+                        "type": "CallExpression",
+                        "start":30,"end":51,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":51}},
+                        "callee": {
+                          "type": "MemberExpression",
+                          "start":30,"end":44,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":44}},
+                          "object": {
+                            "type": "Identifier",
+                            "start":30,"end":34,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":34},"identifierName":"JSON"},
+                            "name": "JSON"
+                          },
+                          "computed": false,
+                          "property": {
+                            "type": "Identifier",
+                            "start":35,"end":44,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":44},"identifierName":"stringify"},
+                            "name": "stringify"
+                          }
+                        },
+                        "arguments": [
+                          {
+                            "type": "Identifier",
+                            "start":45,"end":50,"loc":{"start":{"line":1,"column":45},"end":{"line":1,"column":50},"identifierName":"props"},
+                            "name": "props"
+                          }
+                        ]
+                      }
+                    ]
+                  }
+                }
+              }
+            ],
+            "selfClosing": true
+          },
+          "closingElement": null,
+          "children": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/input.js b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/input.js
new file mode 100644
index 0000000000..90b46deab9
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/input.js
@@ -0,0 +1 @@
+<div key={console.log('foo'), JSON.stringify(props)} />
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/options.json b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/options.json
new file mode 100644
index 0000000000..cbf6d15954
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/output.json b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/output.json
new file mode 100644
index 0000000000..982b611146
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/attribute-sequence-expression/output.json
@@ -0,0 +1,113 @@
+{
+  "type": "File",
+  "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+  "errors": [
+    "SyntaxError: Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)? (1:30)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":55,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":55}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [
+              {
+                "type": "JSXAttribute",
+                "start":5,"end":52,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":52}},
+                "name": {
+                  "type": "JSXIdentifier",
+                  "start":5,"end":8,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":8}},
+                  "name": "key"
+                },
+                "value": {
+                  "type": "JSXExpressionContainer",
+                  "start":9,"end":52,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":52}},
+                  "expression": {
+                    "type": "SequenceExpression",
+                    "start":10,"end":51,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":51}},
+                    "expressions": [
+                      {
+                        "type": "CallExpression",
+                        "start":10,"end":28,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":28}},
+                        "callee": {
+                          "type": "MemberExpression",
+                          "start":10,"end":21,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":21}},
+                          "object": {
+                            "type": "Identifier",
+                            "start":10,"end":17,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":17},"identifierName":"console"},
+                            "name": "console"
+                          },
+                          "computed": false,
+                          "property": {
+                            "type": "Identifier",
+                            "start":18,"end":21,"loc":{"start":{"line":1,"column":18},"end":{"line":1,"column":21},"identifierName":"log"},
+                            "name": "log"
+                          }
+                        },
+                        "arguments": [
+                          {
+                            "type": "StringLiteral",
+                            "start":22,"end":27,"loc":{"start":{"line":1,"column":22},"end":{"line":1,"column":27}},
+                            "extra": {
+                              "rawValue": "foo",
+                              "raw": "'foo'"
+                            },
+                            "value": "foo"
+                          }
+                        ]
+                      },
+                      {
+                        "type": "CallExpression",
+                        "start":30,"end":51,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":51}},
+                        "callee": {
+                          "type": "MemberExpression",
+                          "start":30,"end":44,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":44}},
+                          "object": {
+                            "type": "Identifier",
+                            "start":30,"end":34,"loc":{"start":{"line":1,"column":30},"end":{"line":1,"column":34},"identifierName":"JSON"},
+                            "name": "JSON"
+                          },
+                          "computed": false,
+                          "property": {
+                            "type": "Identifier",
+                            "start":35,"end":44,"loc":{"start":{"line":1,"column":35},"end":{"line":1,"column":44},"identifierName":"stringify"},
+                            "name": "stringify"
+                          }
+                        },
+                        "arguments": [
+                          {
+                            "type": "Identifier",
+                            "start":45,"end":50,"loc":{"start":{"line":1,"column":45},"end":{"line":1,"column":50},"identifierName":"props"},
+                            "name": "props"
+                          }
+                        ]
+                      }
+                    ]
+                  }
+                }
+              }
+            ],
+            "selfClosing": true
+          },
+          "closingElement": null,
+          "children": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/input.js b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/input.js
new file mode 100644
index 0000000000..17d05e6bdc
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/input.js
@@ -0,0 +1 @@
+<div>{console.log('foo'), JSON.stringify(props)}</div>
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/options.json b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/options.json
new file mode 100644
index 0000000000..29a3f0e841
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/options.json
@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/output.json b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/output.json
new file mode 100644
index 0000000000..bd27e4c1c0
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-babel-7/output.json
@@ -0,0 +1,109 @@
+{
+  "type": "File",
+  "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [],
+            "selfClosing": false
+          },
+          "closingElement": {
+            "type": "JSXClosingElement",
+            "start":48,"end":54,"loc":{"start":{"line":1,"column":48},"end":{"line":1,"column":54}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":50,"end":53,"loc":{"start":{"line":1,"column":50},"end":{"line":1,"column":53}},
+              "name": "div"
+            }
+          },
+          "children": [
+            {
+              "type": "JSXExpressionContainer",
+              "start":5,"end":48,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":48}},
+              "expression": {
+                "type": "SequenceExpression",
+                "start":6,"end":47,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":47}},
+                "expressions": [
+                  {
+                    "type": "CallExpression",
+                    "start":6,"end":24,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":24}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":6,"end":17,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":17}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":6,"end":13,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":13},"identifierName":"console"},
+                        "name": "console"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":14,"end":17,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":17},"identifierName":"log"},
+                        "name": "log"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "StringLiteral",
+                        "start":18,"end":23,"loc":{"start":{"line":1,"column":18},"end":{"line":1,"column":23}},
+                        "extra": {
+                          "rawValue": "foo",
+                          "raw": "'foo'"
+                        },
+                        "value": "foo"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "CallExpression",
+                    "start":26,"end":47,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":47}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":26,"end":40,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":40}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":26,"end":30,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":30},"identifierName":"JSON"},
+                        "name": "JSON"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":31,"end":40,"loc":{"start":{"line":1,"column":31},"end":{"line":1,"column":40},"identifierName":"stringify"},
+                        "name": "stringify"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "Identifier",
+                        "start":41,"end":46,"loc":{"start":{"line":1,"column":41},"end":{"line":1,"column":46},"identifierName":"props"},
+                        "name": "props"
+                      }
+                    ]
+                  }
+                ]
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/input.js b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/input.js
new file mode 100644
index 0000000000..abd2de1e0f
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/input.js
@@ -0,0 +1 @@
+<div>{(console.log('foo'), JSON.stringify(props))}</div>
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/output.json b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/output.json
new file mode 100644
index 0000000000..1afdb0d06d
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression-parenthesized/output.json
@@ -0,0 +1,113 @@
+{
+  "type": "File",
+  "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":56,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":56}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [],
+            "selfClosing": false
+          },
+          "closingElement": {
+            "type": "JSXClosingElement",
+            "start":50,"end":56,"loc":{"start":{"line":1,"column":50},"end":{"line":1,"column":56}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":52,"end":55,"loc":{"start":{"line":1,"column":52},"end":{"line":1,"column":55}},
+              "name": "div"
+            }
+          },
+          "children": [
+            {
+              "type": "JSXExpressionContainer",
+              "start":5,"end":50,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":50}},
+              "expression": {
+                "type": "SequenceExpression",
+                "start":7,"end":48,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":48}},
+                "extra": {
+                  "parenthesized": true,
+                  "parenStart": 6
+                },
+                "expressions": [
+                  {
+                    "type": "CallExpression",
+                    "start":7,"end":25,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":25}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":7,"end":18,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":18}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":7,"end":14,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":14},"identifierName":"console"},
+                        "name": "console"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":15,"end":18,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":18},"identifierName":"log"},
+                        "name": "log"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "StringLiteral",
+                        "start":19,"end":24,"loc":{"start":{"line":1,"column":19},"end":{"line":1,"column":24}},
+                        "extra": {
+                          "rawValue": "foo",
+                          "raw": "'foo'"
+                        },
+                        "value": "foo"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "CallExpression",
+                    "start":27,"end":48,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":48}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":27,"end":41,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":41}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":27,"end":31,"loc":{"start":{"line":1,"column":27},"end":{"line":1,"column":31},"identifierName":"JSON"},
+                        "name": "JSON"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":32,"end":41,"loc":{"start":{"line":1,"column":32},"end":{"line":1,"column":41},"identifierName":"stringify"},
+                        "name": "stringify"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "Identifier",
+                        "start":42,"end":47,"loc":{"start":{"line":1,"column":42},"end":{"line":1,"column":47},"identifierName":"props"},
+                        "name": "props"
+                      }
+                    ]
+                  }
+                ]
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/input.js b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/input.js
new file mode 100644
index 0000000000..17d05e6bdc
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/input.js
@@ -0,0 +1 @@
+<div>{console.log('foo'), JSON.stringify(props)}</div>
\ No newline at end of file
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/options.json b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/options.json
new file mode 100644
index 0000000000..cbf6d15954
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}
diff --git a/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/output.json b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/output.json
new file mode 100644
index 0000000000..6204622a6c
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/jsx/errors/sequence-expression/output.json
@@ -0,0 +1,112 @@
+{
+  "type": "File",
+  "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+  "errors": [
+    "SyntaxError: Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)? (1:26)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+        "expression": {
+          "type": "JSXElement",
+          "start":0,"end":54,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":54}},
+          "openingElement": {
+            "type": "JSXOpeningElement",
+            "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":1,"end":4,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":4}},
+              "name": "div"
+            },
+            "attributes": [],
+            "selfClosing": false
+          },
+          "closingElement": {
+            "type": "JSXClosingElement",
+            "start":48,"end":54,"loc":{"start":{"line":1,"column":48},"end":{"line":1,"column":54}},
+            "name": {
+              "type": "JSXIdentifier",
+              "start":50,"end":53,"loc":{"start":{"line":1,"column":50},"end":{"line":1,"column":53}},
+              "name": "div"
+            }
+          },
+          "children": [
+            {
+              "type": "JSXExpressionContainer",
+              "start":5,"end":48,"loc":{"start":{"line":1,"column":5},"end":{"line":1,"column":48}},
+              "expression": {
+                "type": "SequenceExpression",
+                "start":6,"end":47,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":47}},
+                "expressions": [
+                  {
+                    "type": "CallExpression",
+                    "start":6,"end":24,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":24}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":6,"end":17,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":17}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":6,"end":13,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":13},"identifierName":"console"},
+                        "name": "console"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":14,"end":17,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":17},"identifierName":"log"},
+                        "name": "log"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "StringLiteral",
+                        "start":18,"end":23,"loc":{"start":{"line":1,"column":18},"end":{"line":1,"column":23}},
+                        "extra": {
+                          "rawValue": "foo",
+                          "raw": "'foo'"
+                        },
+                        "value": "foo"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "CallExpression",
+                    "start":26,"end":47,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":47}},
+                    "callee": {
+                      "type": "MemberExpression",
+                      "start":26,"end":40,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":40}},
+                      "object": {
+                        "type": "Identifier",
+                        "start":26,"end":30,"loc":{"start":{"line":1,"column":26},"end":{"line":1,"column":30},"identifierName":"JSON"},
+                        "name": "JSON"
+                      },
+                      "computed": false,
+                      "property": {
+                        "type": "Identifier",
+                        "start":31,"end":40,"loc":{"start":{"line":1,"column":31},"end":{"line":1,"column":40},"identifierName":"stringify"},
+                        "name": "stringify"
+                      }
+                    },
+                    "arguments": [
+                      {
+                        "type": "Identifier",
+                        "start":41,"end":46,"loc":{"start":{"line":1,"column":41},"end":{"line":1,"column":46},"identifierName":"props"},
+                        "name": "props"
+                      }
+                    ]
+                  }
+                ]
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file