diff --git a/packages/berry-core/sources/Configuration.ts b/packages/berry-core/sources/Configuration.ts
index 50aecac1a4c9..443743ba1fd3 100644
--- a/packages/berry-core/sources/Configuration.ts
+++ b/packages/berry-core/sources/Configuration.ts
@@ -466,7 +466,7 @@ export class Configuration {
    * one listed on /foo/bar/.yarnrc, but not the other way around).
    */
 
-  static async find(startingCwd: PortablePath, pluginConfiguration: PluginConfiguration | null, {strict = true}: {strict?: boolean} = {}) {
+  static async find(startingCwd: PortablePath, pluginConfiguration: PluginConfiguration | null, {strict = true, useRc = true}: {strict?: boolean, useRc?: boolean} = {}) {
     const environmentSettings = getEnvironmentSettings();
     delete environmentSettings.rcFilename;
 
@@ -486,6 +486,8 @@ export class Configuration {
       const dynamicPlugins = new Set();
 
       for (const {path, cwd, data} of rcFiles) {
+        if (!useRc)
+          continue;
         if (!Array.isArray(data.plugins))
           continue;
 
diff --git a/packages/berry-core/sources/execUtils.ts b/packages/berry-core/sources/execUtils.ts
index 63b1a39e9841..e560a8b1d848 100644
--- a/packages/berry-core/sources/execUtils.ts
+++ b/packages/berry-core/sources/execUtils.ts
@@ -56,7 +56,7 @@ export type ExecvpOptions = {
   strict?: boolean,
 };
 
-export async function execvp(fileName: string, args: Array<string>, opts: ExecvpOptions & {encoding: `buffer`}): Promise<{code: number, stdout: Buffer, stderr: Buffer}>;
+export async function execvp(fileName: string, args: Array<string>, opts: ExecvpOptions & {encoding: 'buffer'}): Promise<{code: number, stdout: Buffer, stderr: Buffer}>;
 export async function execvp(fileName: string, args: Array<string>, opts: ExecvpOptions & {encoding: string}): Promise<{code: number, stdout: string, stderr: string}>;
 export async function execvp(fileName: string, args: Array<string>, opts: ExecvpOptions): Promise<{code: number, stdout: string, stderr: string}>;
 
diff --git a/packages/plugin-npm/sources/NpmFetcher.ts b/packages/plugin-npm/sources/NpmFetcher.ts
index 37a9ec7bde08..d0f57b6866eb 100644
--- a/packages/plugin-npm/sources/NpmFetcher.ts
+++ b/packages/plugin-npm/sources/NpmFetcher.ts
@@ -51,7 +51,7 @@ export class NpmFetcher implements Fetcher {
       });
     } catch (error) {
       // The npm registry doesn't always support %2f when fetching the package tarballs 🤡
-      // Ex: https://registry.yarnpkg.com/@emotion%2fbabel-preset-css-prop/-/babel-preset-css-prop-10.0.7.tgz0
+      // Ex: https://registry.yarnpkg.com/@emotion%2fbabel-preset-css-prop/-/babel-preset-css-prop-10.0.7.tgz
       sourceBuffer = await npmHttpUtils.get(this.getLocatorUrl(locator, opts).replace(/%2f/g, `/`), {
         configuration: opts.project.configuration,
         ident: locator,
diff --git a/packages/plugin-npm/sources/npmHttpUtils.ts b/packages/plugin-npm/sources/npmHttpUtils.ts
index e86b0aafdd9d..c3dfe75dfec6 100644
--- a/packages/plugin-npm/sources/npmHttpUtils.ts
+++ b/packages/plugin-npm/sources/npmHttpUtils.ts
@@ -1,7 +1,6 @@
 import {Configuration, Ident, httpUtils} from '@berry/core';
 import {MessageName, ReportError}        from '@berry/core';
 import inquirer                          from 'inquirer';
-import {resolve as resolveUrl}           from 'url';
 
 import * as npmConfigUtils               from './npmConfigUtils';
 import {MapLike}                         from './npmConfigUtils';
@@ -76,6 +75,10 @@ export async function put(path: string, body: httpUtils.Body, {configuration, he
   }
 }
 
+function resolveUrl(registry: string, path: string) {
+  return registry.replace(/\/+$/, ``) + path;
+}
+
 function getAuthenticationHeader(registry: string, {authType = AuthType.CONFIGURATION, configuration}: {authType?: AuthType, configuration: Configuration}) {
   const registryConfiguration = npmConfigUtils.getRegistryConfiguration(registry, {configuration});
   const effectiveConfiguration = registryConfiguration || configuration;
diff --git a/packages/plugin-npm/tests/npmHttpUtils.test.js b/packages/plugin-npm/tests/npmHttpUtils.test.js
new file mode 100644
index 000000000000..c38e5871c789
--- /dev/null
+++ b/packages/plugin-npm/tests/npmHttpUtils.test.js
@@ -0,0 +1,43 @@
+import {Configuration, httpUtils} from '@berry/core';
+import {get}                      from '@berry/plugin-npm/sources/npmHttpUtils';
+
+jest.mock(`@berry/core`, () => ({
+  ... require.requireActual(`@berry/core`),
+  httpUtils: {
+    ... require.requireActual(`@berry/core`).httpUtils,
+    get: jest.fn(() => Promise.resolve()),
+  },
+}));
+
+const makeConfiguration = () => Configuration.find(__dirname, {
+  modules: new Map([
+    [`@berry/core`, require(`@berry/core`)],
+    [`@berry/fslib`, require(`@berry/core`)],
+    [`@berry/plugin-npm`, require(`@berry/plugin-npm`)],
+  ]),
+  plugins: new Set([
+    `@berry/plugin-npm`,
+  ]),
+}, {
+  useRc: false,
+  strict: false,
+});
+
+describe(`npmHttpUtils.get`, () => {
+  for (const registry of [`https://example.org`, `https://example.org/`, `https://example.org/foo`, `https://example.org/foo/`]) {
+    for (const path of [`/bar`]) {
+      const expected = registry.replace(/\/+$/, ``) + path;
+
+      it(`should craft the final path correctly (${registry} + ${path} = ${expected})`, async () => {
+        const configuration = await makeConfiguration();
+
+        await get(path, {
+          configuration,
+          registry,
+        });
+
+        expect(httpUtils.get).toHaveBeenCalledWith(expected, expect.anything());
+      });
+    }
+  }
+});