diff --git a/src/liquid-options.ts b/src/liquid-options.ts
index 95143c5cda..c0ff85671f 100644
--- a/src/liquid-options.ts
+++ b/src/liquid-options.ts
@@ -1,6 +1,6 @@
 import { assert, isArray, isString, isFunction } from './util'
 import { LRU, LiquidCache } from './cache'
-import { FS } from './fs/fs'
+import { FS, LookupType } from './fs'
 import * as fs from './fs/node'
 import { defaultOperators, Operators } from './render'
 import { json } from './filters/misc'
@@ -91,6 +91,10 @@ export interface RenderOptions {
   ownPropertyOnly?: boolean;
 }
 
+export interface RenderFileOptions extends RenderOptions {
+  lookupType?: LookupType;
+}
+
 interface NormalizedOptions extends LiquidOptions {
   root?: string[];
   partials?: string[];
diff --git a/src/liquid.ts b/src/liquid.ts
index 30f199632e..0336fa3c48 100644
--- a/src/liquid.ts
+++ b/src/liquid.ts
@@ -6,7 +6,7 @@ import { Render } from './render'
 import { Parser } from './parser'
 import { tags } from './tags'
 import { filters } from './filters'
-import { LiquidOptions, normalizeDirectoryList, NormalizedFullOptions, normalize, RenderOptions } from './liquid-options'
+import { LiquidOptions, normalizeDirectoryList, NormalizedFullOptions, normalize, RenderOptions, RenderFileOptions } from './liquid-options'
 
 export class Liquid {
   public readonly options: NormalizedFullOptions
@@ -25,8 +25,8 @@ export class Liquid {
     return this.parser.parse(html, filepath)
   }
 
-  public _render (tpl: Template[], scope: object | undefined, renderOptions: RenderOptions): IterableIterator<any> {
-    const ctx = new Context(scope, this.options, renderOptions)
+  public _render (tpl: Template[], scope: Context | object | undefined, renderOptions: RenderOptions): IterableIterator<any> {
+    const ctx = scope instanceof Context ? scope : new Context(scope, this.options, renderOptions)
     return this.renderer.renderTemplates(tpl, ctx)
   }
   public async render (tpl: Template[], scope?: object, renderOptions?: RenderOptions): Promise<any> {
@@ -40,14 +40,14 @@ export class Liquid {
     return this.renderer.renderTemplatesToNodeStream(tpl, ctx)
   }
 
-  public _parseAndRender (html: string, scope: object | undefined, renderOptions: RenderOptions): IterableIterator<any> {
+  public _parseAndRender (html: string, scope: Context | object | undefined, renderOptions: RenderOptions): IterableIterator<any> {
     const tpl = this.parse(html)
     return this._render(tpl, scope, renderOptions)
   }
-  public async parseAndRender (html: string, scope?: object, renderOptions?: RenderOptions): Promise<any> {
+  public async parseAndRender (html: string, scope?: Context | object, renderOptions?: RenderOptions): Promise<any> {
     return toPromise(this._parseAndRender(html, scope, { ...renderOptions, sync: false }))
   }
-  public parseAndRenderSync (html: string, scope?: object, renderOptions?: RenderOptions): any {
+  public parseAndRenderSync (html: string, scope?: Context | object, renderOptions?: RenderOptions): any {
     return toValueSync(this._parseAndRender(html, scope, { ...renderOptions, sync: true }))
   }
 
@@ -57,19 +57,24 @@ export class Liquid {
   public _parseLayoutFile (file: string, sync?: boolean, currentFile?: string) {
     return this.parser.parseFile(file, sync, LookupType.Layouts, currentFile)
   }
-  public async parseFile (file: string): Promise<Template[]> {
-    return toPromise<Template[]>(this.parser.parseFile(file, false))
+  public _parseFile (file: string, sync?: boolean, lookupType?: LookupType, currentFile?: string): Generator<unknown, Template[]> {
+    return this.parser.parseFile(file, sync, lookupType, currentFile)
   }
-  public parseFileSync (file: string): Template[] {
-    return toValueSync<Template[]>(this.parser.parseFile(file, true))
+  public async parseFile (file: string, lookupType?: LookupType): Promise<Template[]> {
+    return toPromise<Template[]>(this.parser.parseFile(file, false, lookupType))
   }
-  public async renderFile (file: string, ctx?: object, renderOptions?: RenderOptions) {
-    const templates = await this.parseFile(file)
-    return this.render(templates, ctx, renderOptions)
+  public parseFileSync (file: string, lookupType?: LookupType): Template[] {
+    return toValueSync<Template[]>(this.parser.parseFile(file, true, lookupType))
+  }
+  public * _renderFile (file: string, ctx: Context | object | undefined, renderFileOptions: RenderFileOptions): Generator<any> {
+    const templates = (yield this._parseFile(file, renderFileOptions.sync, renderFileOptions.lookupType)) as Template[]
+    return yield this._render(templates, ctx, renderFileOptions)
+  }
+  public async renderFile (file: string, ctx?: Context | object, renderFileOptions?: RenderFileOptions) {
+    return toPromise(this._renderFile(file, ctx, { ...renderFileOptions, sync: false }))
   }
-  public renderFileSync (file: string, ctx?: object, renderOptions?: RenderOptions) {
-    const templates = this.parseFileSync(file)
-    return this.renderSync(templates, ctx, renderOptions)
+  public renderFileSync (file: string, ctx?: Context | object, renderFileOptions?: RenderFileOptions) {
+    return toValueSync(this._renderFile(file, ctx, { ...renderFileOptions, sync: true }))
   }
   public async renderFileToNodeStream (file: string, scope?: object, renderOptions?: RenderOptions) {
     const templates = await this.parseFile(file)
diff --git a/src/template/tag-options-adapter.ts b/src/template/tag-options-adapter.ts
index 4bb23043ed..cb4478afd9 100644
--- a/src/template/tag-options-adapter.ts
+++ b/src/template/tag-options-adapter.ts
@@ -7,8 +7,9 @@ import { Context } from '../context'
 import type { Liquid } from '../liquid'
 
 export interface TagImplOptions {
-  parse?: (this: Tag, token: TagToken, remainingTokens: TopLevelToken[]) => void;
-  render: (this: Tag, ctx: Context, emitter: Emitter, hash: Record<string, any>) => TagRenderReturn;
+  [key: string]: any
+  parse?: (this: Tag & TagImplOptions, token: TagToken, remainingTokens: TopLevelToken[]) => void;
+  render: (this: Tag & TagImplOptions, ctx: Context, emitter: Emitter, hash: Record<string, any>) => TagRenderReturn;
 }
 
 export function createTagClass (options: TagImplOptions): TagClass {
diff --git a/test/e2e/issues.ts b/test/e2e/issues.ts
index 734655fbd1..ba6af67a23 100644
--- a/test/e2e/issues.ts
+++ b/test/e2e/issues.ts
@@ -1,4 +1,4 @@
-import { Tokenizer, Context, Liquid, Drop, toValueSync } from '../..'
+import { TopLevelToken, TagToken, Tokenizer, Context, Liquid, Drop, toValueSync } from '../..'
 import { expect, use } from 'chai'
 import * as chaiAsPromised from 'chai-as-promised'
 import * as sinon from 'sinon'
@@ -346,4 +346,20 @@ describe('Issues', function () {
     const html = await liquid.parseAndRender(tpl)
     expect(html).to.match(/^\s*This is a love or luck potion.\s+This is a strength or health or love potion.\s*$/)
   })
+  it('#570 tag registration compatible to v9', async () => {
+    const liquid = new Liquid()
+    liquid.registerTag('metadata_file', {
+      parse (tagToken: TagToken, remainTokens: TopLevelToken[]) {
+        this.str = tagToken.args
+      },
+      async render (ctx: Context) {
+        const content = await Promise.resolve(`{{${this.str}}}`)
+        return this.liquid.parseAndRender(content.toString(), ctx)
+      }
+    })
+    const tpl = '{% metadata_file foo %}'
+    const ctx = { foo: 'FOO' }
+    const html = await liquid.parseAndRender(tpl, ctx)
+    expect(html).to.equal('FOO')
+  })
 })
diff --git a/test/integration/liquid/liquid.ts b/test/integration/liquid/liquid.ts
index 8a50b4fb8f..5a020c7b2f 100644
--- a/test/integration/liquid/liquid.ts
+++ b/test/integration/liquid/liquid.ts
@@ -57,6 +57,10 @@ describe('Liquid', function () {
       const html = await engine.parseAndRender(src, { foo: Promise.resolve('FOO') })
       expect(html).to.equal('FOO')
     })
+    it('should parse and render with Context', async function () {
+      const html = await engine.parseAndRender('{{foo}}', new Context({ foo: 'FOO' }))
+      expect(html).to.equal('FOO')
+    })
   })
   describe('#parseAndRenderSync', function () {
     const engine = new Liquid()
@@ -145,6 +149,11 @@ describe('Liquid', function () {
       const str = await engine.evalValue('"foo"', ctx)
       expect(str).to.equal('foo')
     })
+    it('should support plain scope', async function () {
+      const engine = new Liquid()
+      const str = await engine.evalValue('foo', { foo: 'FOO' })
+      expect(str).to.equal('FOO')
+    })
   })
   describe('#evalValueSync', function () {
     it('should eval string literal', function () {