diff --git a/src/parser/expression.js b/src/parser/expression.js
index f044c613b4..6086f97dbe 100644
--- a/src/parser/expression.js
+++ b/src/parser/expression.js
@@ -662,7 +662,7 @@ export default class ExpressionParser extends LValParser {
     const id = this.parseIdentifier(true);
     this.expect(tt.dot);
     if (!this.inModule) {
-      this.raise(id.start, "import.meta may appear only with 'sourceType: module'");
+      this.raise(id.start, `import.meta may appear only with 'sourceType: "module"'`);
     }
     return this.parseMetaProperty(node, id, "meta");
   }
diff --git a/src/parser/statement.js b/src/parser/statement.js
index bb9b4bf18b..f59b9e8ee9 100644
--- a/src/parser/statement.js
+++ b/src/parser/statement.js
@@ -116,7 +116,7 @@ export default class StatementParser extends ExpressionParser {
           }
 
           if (!this.inModule) {
-            this.raise(this.state.start, "'import' and 'export' may appear only with 'sourceType: module'");
+            this.raise(this.state.start, `'import' and 'export' may appear only with 'sourceType: "module"'`);
           }
         }
         return starttype === tt._import ? this.parseImport(node) : this.parseExport(node);
diff --git a/test/fixtures/esprima/es2015-identifier/invalid_expression_await/options.json b/test/fixtures/esprima/es2015-identifier/invalid_expression_await/options.json
index 53ee186d1b..6583569ead 100644
--- a/test/fixtures/esprima/es2015-identifier/invalid_expression_await/options.json
+++ b/test/fixtures/esprima/es2015-identifier/invalid_expression_await/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "'import' and 'export' may appear only with 'sourceType: module' (1:0)"
+  "throws": "'import' and 'export' may appear only with 'sourceType: \"module\"' (1:0)"
 }
\ No newline at end of file
diff --git a/test/fixtures/esprima/es2015-identifier/invalid_var_await/options.json b/test/fixtures/esprima/es2015-identifier/invalid_var_await/options.json
index 53ee186d1b..6583569ead 100644
--- a/test/fixtures/esprima/es2015-identifier/invalid_var_await/options.json
+++ b/test/fixtures/esprima/es2015-identifier/invalid_var_await/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "'import' and 'export' may appear only with 'sourceType: module' (1:0)"
+  "throws": "'import' and 'export' may appear only with 'sourceType: \"module\"' (1:0)"
 }
\ No newline at end of file
diff --git a/test/fixtures/esprima/es2015-yield/invalid-yield-generator-export-default/options.json b/test/fixtures/esprima/es2015-yield/invalid-yield-generator-export-default/options.json
index 53ee186d1b..6583569ead 100644
--- a/test/fixtures/esprima/es2015-yield/invalid-yield-generator-export-default/options.json
+++ b/test/fixtures/esprima/es2015-yield/invalid-yield-generator-export-default/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "'import' and 'export' may appear only with 'sourceType: module' (1:0)"
+  "throws": "'import' and 'export' may appear only with 'sourceType: \"module\"' (1:0)"
 }
\ No newline at end of file
diff --git a/test/fixtures/experimental/import-meta/error-in-script/options.json b/test/fixtures/experimental/import-meta/error-in-script/options.json
index 8fc6ce37a5..eb1e545759 100644
--- a/test/fixtures/experimental/import-meta/error-in-script/options.json
+++ b/test/fixtures/experimental/import-meta/error-in-script/options.json
@@ -1,5 +1,5 @@
 {
-  "throws": "import.meta may appear only with 'sourceType: module' (1:10)",
+  "throws": "import.meta may appear only with 'sourceType: \"module\"' (1:10)",
   "plugins": ["dynamicImport", "importMeta"],
   "sourceType": "script"
 }