diff --git a/after/syntax/javascript/graphql.vim b/after/syntax/javascript/graphql.vim
index 2edf9f2..6349864 100644
--- a/after/syntax/javascript/graphql.vim
+++ b/after/syntax/javascript/graphql.vim
@@ -25,7 +25,11 @@ if exists('b:current_syntax')
   let s:current_syntax = b:current_syntax
   unlet b:current_syntax
 endif
+
+let b:graphql_nested_syntax = 1
 syn include @GraphQLSyntax syntax/graphql.vim
+unlet b:graphql_nested_syntax
+
 if exists('s:current_syntax')
   let b:current_syntax = s:current_syntax
 endif
diff --git a/after/syntax/php/graphql.vim b/after/syntax/php/graphql.vim
index 165e472..b61a21d 100644
--- a/after/syntax/php/graphql.vim
+++ b/after/syntax/php/graphql.vim
@@ -25,7 +25,11 @@ if exists('b:current_syntax')
   let s:current_syntax = b:current_syntax
   unlet b:current_syntax
 endif
+
+let b:graphql_nested_syntax = 1
 syn include @GraphQLSyntax syntax/graphql.vim
+unlet b:graphql_nested_syntax
+
 if exists('s:current_syntax')
   let b:current_syntax = s:current_syntax
 endif
diff --git a/after/syntax/reason/graphql.vim b/after/syntax/reason/graphql.vim
index f6e168b..8656b2a 100644
--- a/after/syntax/reason/graphql.vim
+++ b/after/syntax/reason/graphql.vim
@@ -25,7 +25,11 @@ if exists('b:current_syntax')
   let s:current_syntax = b:current_syntax
   unlet b:current_syntax
 endif
+
+let b:graphql_nested_syntax = 1
 syn include @GraphQLSyntax syntax/graphql.vim
+unlet b:graphql_nested_syntax
+
 if exists('s:current_syntax')
   let b:current_syntax = s:current_syntax
 endif
diff --git a/after/syntax/typescript/graphql.vim b/after/syntax/typescript/graphql.vim
index 7fc4b0c..4ab0021 100644
--- a/after/syntax/typescript/graphql.vim
+++ b/after/syntax/typescript/graphql.vim
@@ -25,7 +25,11 @@ if exists('b:current_syntax')
   let s:current_syntax = b:current_syntax
   unlet b:current_syntax
 endif
+
+let b:graphql_nested_syntax = 1
 syn include @GraphQLSyntax syntax/graphql.vim
+unlet b:graphql_nested_syntax
+
 if exists('s:current_syntax')
   let b:current_syntax = s:current_syntax
 endif
diff --git a/syntax/graphql.vim b/syntax/graphql.vim
index ae0bce8..2aa623b 100644
--- a/syntax/graphql.vim
+++ b/syntax/graphql.vim
@@ -90,6 +90,8 @@ hi def link graphqlStructure        Structure
 hi def link graphqlType             Type
 hi def link graphqlVariable         Identifier
 
-syn sync minlines=500
+if !get(b:, 'graphql_nested_syntax')
+    syn sync minlines=500
+endif
 
 let b:current_syntax = 'graphql'
diff --git a/test/php/default.vader b/test/php/default.vader
index d9c01b9..1a58ebc 100644
--- a/test/php/default.vader
+++ b/test/php/default.vader
@@ -45,3 +45,8 @@ Given php (Nowdoc):
 Execute (Syntax assertions):
   AssertEqual 'Delimiter', SyntaxOf('GQL')
   AssertEqual 'graphqlName', SyntaxOf('user')
+
+Execute (Settings assertions):
+  redir @a | syntax sync | redir END
+  let match = match(@a, 'syncing starts 500 lines before top line') >= 0
+  Assert !match, "'syntax sync minlines' was changed in outer syntax"