diff --git a/lib/util/resolveCommand.js b/lib/util/resolveCommand.js
index 6825a8b..7972455 100644
--- a/lib/util/resolveCommand.js
+++ b/lib/util/resolveCommand.js
@@ -2,9 +2,10 @@
 
 const path = require('path');
 const which = require('which');
-const pathKey = require('path-key')();
+const getPathKey = require('path-key');
 
 function resolveCommandAttempt(parsed, withoutPathExt) {
+    const env = parsed.options.env || process.env;
     const cwd = process.cwd();
     const hasCustomCwd = parsed.options.cwd != null;
     // Worker threads do not have process.chdir()
@@ -24,7 +25,7 @@ function resolveCommandAttempt(parsed, withoutPathExt) {
 
     try {
         resolved = which.sync(parsed.command, {
-            path: (parsed.options.env || process.env)[pathKey],
+            path: env[getPathKey({ env })],
             pathExt: withoutPathExt ? path.delimiter : undefined,
         });
     } catch (e) {
diff --git a/test/fixtures/whoami.cmd b/test/fixtures/whoami.cmd
new file mode 100644
index 0000000..4ffec34
--- /dev/null
+++ b/test/fixtures/whoami.cmd
@@ -0,0 +1,2 @@
+@echo off
+echo you sure are someone
diff --git a/test/index.test.js b/test/index.test.js
index 2217d9c..5373627 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -434,5 +434,22 @@ run.methods.forEach((method) => {
                 expect(Number(stdout.trim())).toBe(process.pid);
             });
         }
+
+        if (isWin) {
+            const differentPathKey = pathKey.startsWith('p') ? 'PATH' : 'path';
+
+            it('should work if the path key is different in options.env', async () => {
+                const env = {
+                    ...process.env,
+                    [differentPathKey]: `${__dirname}\\fixtures;${process.env[pathKey]}`,
+                };
+
+                delete env[pathKey];
+
+                const { stdout } = await run(method, 'whoami', { env });
+
+                expect(stdout.trim()).toBe('you sure are someone');
+            });
+        }
     });
 });