diff --git a/src/index.js b/src/index.js
index 37d489c7..3aa747e2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -26,7 +26,7 @@ import {
 } from './utils';
 
 export default function loader(content, map, meta) {
-  const options = getOptions(this) || {};
+  const options = getOptions(this);
 
   validateOptions(schema, options, {
     name: 'CSS Loader',
diff --git a/src/plugins/postcss-import-parser.js b/src/plugins/postcss-import-parser.js
index 94b1f10c..2f262f75 100644
--- a/src/plugins/postcss-import-parser.js
+++ b/src/plugins/postcss-import-parser.js
@@ -50,7 +50,7 @@ export default postcss.plugin(pluginName, (options) => (css, result) => {
       if (nodes[0].type === 'string') {
         isStringValue = true;
         url = nodes[0].value;
-      } else if (nodes[0].type === 'function') {
+      } else {
         // Invalid function - `@import nourl(test.css);`
         if (nodes[0].value.toLowerCase() !== 'url') {
           result.warn(`Unable to find uri in "${atRule.toString()}"`, {
diff --git a/src/plugins/postcss-url-parser.js b/src/plugins/postcss-url-parser.js
index 05732cae..ae8a7463 100644
--- a/src/plugins/postcss-url-parser.js
+++ b/src/plugins/postcss-url-parser.js
@@ -172,10 +172,9 @@ export default postcss.plugin(pluginName, (options) => (css, result) => {
       const { node, url, needQuotes, isStringValue } = rule;
       const splittedUrl = url.split(/(\?)?#/);
       const [urlWithoutHash, singleQuery, hashValue] = splittedUrl;
-      const hash =
-        singleQuery || hashValue
-          ? `${singleQuery ? '?' : ''}${hashValue ? `#${hashValue}` : ''}`
-          : '';
+
+      let hash = singleQuery ? '?' : '';
+      hash += hashValue ? `#${hashValue}` : '';
 
       let normalizedUrl = normalizeUrl(
         urlWithoutHash,
diff --git a/test/__snapshots__/import-option.test.js.snap b/test/__snapshots__/import-option.test.js.snap
index 8b33afde..213691d1 100644
--- a/test/__snapshots__/import-option.test.js.snap
+++ b/test/__snapshots__/import-option.test.js.snap
@@ -313,6 +313,68 @@ Array [
 
 exports[`"import" option should respect style field in package.json: warnings 1`] = `Array []`;
 
+exports[`"import" option should work resolve order: local -> node_modules -> alias: errors 1`] = `Array []`;
+
+exports[`"import" option should work resolve order: local -> node_modules -> alias: module 1`] = `
+"// Imports
+import ___CSS_LOADER_API_IMPORT___ from \\"../../../src/runtime/api.js\\";
+import ___CSS_LOADER_AT_RULE_IMPORT_0___ from \\"-!../../../src/index.js??[ident]!./test.css\\";
+import ___CSS_LOADER_AT_RULE_IMPORT_1___ from \\"-!../../../src/index.js??[ident]!./issue-683.css\\";
+import ___CSS_LOADER_AT_RULE_IMPORT_2___ from \\"-!../../../src/index.js??[ident]!./node_modules/package/tilde.css\\";
+var ___CSS_LOADER_EXPORT___ = ___CSS_LOADER_API_IMPORT___(false);
+___CSS_LOADER_EXPORT___.i(___CSS_LOADER_AT_RULE_IMPORT_0___);
+___CSS_LOADER_EXPORT___.i(___CSS_LOADER_AT_RULE_IMPORT_1___);
+___CSS_LOADER_EXPORT___.i(___CSS_LOADER_AT_RULE_IMPORT_2___);
+// Module
+___CSS_LOADER_EXPORT___.push([module.id, \\"\\\\n\\", \\"\\"]);
+// Exports
+export default ___CSS_LOADER_EXPORT___;
+"
+`;
+
+exports[`"import" option should work resolve order: local -> node_modules -> alias: result 1`] = `
+Array [
+  Array [
+    "../../src/index.js?[ident]!./import/test.css",
+    ".test {
+  a: a;
+}
+",
+    "",
+  ],
+  Array [
+    "../../src/index.js?[ident]!./import/node_modules/issue-683/test.css",
+    ".test {
+  color: coral;
+}
+",
+    "",
+  ],
+  Array [
+    "../../src/index.js?[ident]!./import/issue-683.css",
+    "
+",
+    "",
+  ],
+  Array [
+    "../../src/index.js?[ident]!./import/node_modules/package/tilde.css",
+    ".tilde {
+  color: yellow;
+}
+",
+    "",
+  ],
+  Array [
+    "./import/import-order.css",
+    "
+",
+    "",
+  ],
+]
+`;
+
+exports[`"import" option should work resolve order: local -> node_modules -> alias: warnings 1`] = `Array []`;
+
 exports[`"import" option should work when "Function": errors 1`] = `Array []`;
 
 exports[`"import" option should work when "Function": module 1`] = `
diff --git a/test/__snapshots__/loader.test.js.snap b/test/__snapshots__/loader.test.js.snap
index acc8a8fb..5a2ae929 100644
--- a/test/__snapshots__/loader.test.js.snap
+++ b/test/__snapshots__/loader.test.js.snap
@@ -579,6 +579,23 @@ a[href=\\"\\" i] {
 
 exports[`loader should work with empty options: warnings 1`] = `Array []`;
 
+exports[`loader should work with none AST metadata: errors 1`] = `Array []`;
+
+exports[`loader should work with none AST metadata: result 1`] = `
+Array [
+  Array [
+    "./simple.css",
+    ".some-class {
+  color: red;
+}
+",
+    "",
+  ],
+]
+`;
+
+exports[`loader should work with none AST metadata: warnings 1`] = `Array []`;
+
 exports[`loader should work with the "modules.auto" option and the "importLoaders" option: errors 1`] = `Array []`;
 
 exports[`loader should work with the "modules.auto" option and the "importLoaders" option: result 1`] = `
diff --git a/test/fixtures/import/import-order.css b/test/fixtures/import/import-order.css
new file mode 100644
index 00000000..f758ecfa
--- /dev/null
+++ b/test/fixtures/import/import-order.css
@@ -0,0 +1,3 @@
+@import "test";
+@import "issue-683";
+@import "aliasesPackage";
diff --git a/test/fixtures/import/import-order.js b/test/fixtures/import/import-order.js
new file mode 100644
index 00000000..f596f02a
--- /dev/null
+++ b/test/fixtures/import/import-order.js
@@ -0,0 +1,5 @@
+import css from './import-order.css';
+
+__export__ = css;
+
+export default css;
diff --git a/test/fixtures/import/node_modules/issue-683/package.json b/test/fixtures/import/node_modules/issue-683/package.json
index 6b821392..2d5fb35c 100644
--- a/test/fixtures/import/node_modules/issue-683/package.json
+++ b/test/fixtures/import/node_modules/issue-683/package.json
@@ -3,7 +3,7 @@
     "name": "test"
   },
   "description": "test",
-  "main": "test.css",
+  "main": "test.js",
   "name": "test",
   "style": "test.css",
   "version": "1.0.0"
diff --git a/test/fixtures/import/node_modules/test/package.json b/test/fixtures/import/node_modules/test/package.json
new file mode 100644
index 00000000..8ebed9e8
--- /dev/null
+++ b/test/fixtures/import/node_modules/test/package.json
@@ -0,0 +1,9 @@
+{
+  "author": {
+    "name": "test"
+  },
+  "description": "test",
+  "main": "test.css",
+  "name": "test",
+  "version": "1.0.0"
+}
diff --git a/test/fixtures/import/node_modules/test/test.css b/test/fixtures/import/node_modules/test/test.css
new file mode 100644
index 00000000..003440fd
--- /dev/null
+++ b/test/fixtures/import/node_modules/test/test.css
@@ -0,0 +1,3 @@
+.test-package {
+  d: d
+}
diff --git a/test/helpers/getCompiler.js b/test/helpers/getCompiler.js
index 5061f6de..7c20108a 100644
--- a/test/helpers/getCompiler.js
+++ b/test/helpers/getCompiler.js
@@ -35,6 +35,10 @@ export default (fixture, loaderOptions = {}, config = {}) => {
     },
     resolve: {
       alias: {
+        aliasesPackage: path.resolve(
+          __dirname,
+          '../fixtures/import/node_modules/package/tilde.css'
+        ),
         aliasesImg: path.resolve(__dirname, '../fixtures/url'),
         aliasesImport: path.resolve(__dirname, '../fixtures/import'),
         aliasesComposes: path.resolve(
diff --git a/test/helpers/preLoader.js b/test/helpers/preLoader.js
new file mode 100644
index 00000000..8e624432
--- /dev/null
+++ b/test/helpers/preLoader.js
@@ -0,0 +1,5 @@
+export default function loader(content, map) {
+  const callback = this.async();
+
+  return callback(null, content, map, 'non-ast-meta');
+}
diff --git a/test/import-option.test.js b/test/import-option.test.js
index 7c172bfb..256446fd 100644
--- a/test/import-option.test.js
+++ b/test/import-option.test.js
@@ -153,6 +153,20 @@ describe('"import" option', () => {
     expect(getErrors(stats)).toMatchSnapshot('errors');
   });
 
+  it('should work resolve order: local -> node_modules -> alias', async () => {
+    const compiler = getCompiler('./import/import-order.js');
+    const stats = await compile(compiler);
+
+    expect(getModuleSource('./import/import-order.css', stats)).toMatchSnapshot(
+      'module'
+    );
+    expect(getExecutedCode('main.bundle.js', compiler, stats)).toMatchSnapshot(
+      'result'
+    );
+    expect(getWarnings(stats)).toMatchSnapshot('warnings');
+    expect(getErrors(stats)).toMatchSnapshot('errors');
+  });
+
   it('should emit warning when unresolved import', async () => {
     const compiler = getCompiler('./import/unresolved.js');
     const stats = await compile(compiler);
diff --git a/test/loader.test.js b/test/loader.test.js
index b4d1a1df..115bcfd9 100644
--- a/test/loader.test.js
+++ b/test/loader.test.js
@@ -411,4 +411,35 @@ describe('loader', () => {
     expect(getWarnings(stats)).toMatchSnapshot('warnings');
     expect(getErrors(stats)).toMatchSnapshot('errors');
   });
+
+  it('should work with none AST metadata', async () => {
+    const compiler = getCompiler(
+      './simple.js',
+      {},
+      {
+        module: {
+          rules: [
+            {
+              test: /\.css$/i,
+              rules: [
+                {
+                  loader: path.resolve(__dirname, '../src'),
+                },
+                {
+                  loader: path.resolve(__dirname, '../test/helpers/preLoader'),
+                },
+              ],
+            },
+          ],
+        },
+      }
+    );
+    const stats = await compile(compiler);
+
+    expect(getExecutedCode('main.bundle.js', compiler, stats)).toMatchSnapshot(
+      'result'
+    );
+    expect(getWarnings(stats)).toMatchSnapshot('warnings');
+    expect(getErrors(stats)).toMatchSnapshot('errors');
+  });
 });
diff --git a/test/runtime/__snapshots__/api.test.js.snap b/test/runtime/__snapshots__/api.test.js.snap
index 23ba2486..3304a234 100644
--- a/test/runtime/__snapshots__/api.test.js.snap
+++ b/test/runtime/__snapshots__/api.test.js.snap
@@ -2,6 +2,10 @@
 
 exports[`api should import modules 1`] = `"body { b: 2; }body { c: 3; }body { b: 2; }@media print {body { b: 2; }}@media print {body { d: 4; }}@media screen and (orientation:landscape) {body { a: 1; }}@media (orientation:landscape) {body { a: 1; }}"`;
 
+exports[`api should import modules when module string 1`] = `".button { b: 2; }"`;
+
+exports[`api should import modules with dedupe 1`] = `"body { b: 1; }body { b: 2; }.button { b: 3; }"`;
+
 exports[`api should import named modules 1`] = `"body { b: 2; }body { c: 3; }body { b: 2; }@media print {body { b: 2; }}@media print {body { d: 4; }}@media screen {body { a: 1; }}"`;
 
 exports[`api should toString a single module 1`] = `"body { a: 1; }"`;
diff --git a/test/runtime/api.test.js b/test/runtime/api.test.js
index ced44a64..f945c4b2 100644
--- a/test/runtime/api.test.js
+++ b/test/runtime/api.test.js
@@ -137,4 +137,30 @@ describe('api', () => {
 
     expect(m.toString()).toMatchSnapshot();
   });
+
+  it('should import modules with dedupe', () => {
+    const m = api();
+
+    const m1 = [null, 'body { b: 1; }', ''];
+    const m2 = ['./module2', 'body { b: 2; }', ''];
+    const m3 = ['./module3', '.button { b: 3; }', ''];
+
+    m.i([m1], '', true);
+    m.i([m2], '', true);
+    m.i([m3], '', true);
+    m.i([m3], '', true);
+    m.i([m3], '', true);
+
+    expect(m.toString()).toMatchSnapshot();
+    expect(m.length).toBe(3);
+  });
+
+  it('should import modules when module string', () => {
+    const m = api();
+
+    m.i('.button { b: 2; }');
+    m.i('');
+
+    expect(m.toString()).toMatchSnapshot();
+  });
 });