diff --git a/spec/update-process-env-spec.js b/spec/update-process-env-spec.js
index e5a1cfd9c..f7948d998 100644
--- a/spec/update-process-env-spec.js
+++ b/spec/update-process-env-spec.js
@@ -36,7 +36,7 @@ describe('updateProcessEnv(launchEnv)', function () {
   })
 
   describe('when the launch environment appears to come from a shell', function () {
-    it('updates process.env to match the launch environment', async function () {
+    it('updates process.env to match the launch environment because PWD is set', async function () {
       process.env = {
         WILL_BE_DELETED: 'hi',
         NODE_ENV: 'the-node-env',
@@ -64,6 +64,65 @@ describe('updateProcessEnv(launchEnv)', function () {
       expect(process.env).toBe(initialProcessEnv)
     })
 
+    it('updates process.env to match the launch environment because PROMPT is set', async function () {
+      process.env = {
+        WILL_BE_DELETED: 'hi',
+        NODE_ENV: 'the-node-env',
+        NODE_PATH: '/the/node/path',
+        ATOM_HOME: '/the/atom/home'
+      }
+
+      const initialProcessEnv = process.env
+
+      await updateProcessEnv({ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT: 'true', PROMPT: '$P$G', KEY1: 'value1', KEY2: 'value2'})
+      expect(process.env).toEqual({
+        ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT: 'true',
+        PROMPT: '$P$G',
+        KEY1: 'value1',
+        KEY2: 'value2',
+        NODE_ENV: 'the-node-env',
+        NODE_PATH: '/the/node/path',
+        ATOM_HOME: '/the/atom/home'
+      })
+
+      // See #11302. On Windows, `process.env` is a magic object that offers
+      // case-insensitive environment variable matching, so we cannot replace it
+      // with another object.
+      expect(process.env).toBe(initialProcessEnv)
+    })
+
+    it('updates process.env to match the launch environment because PSModulePath is set', async function () {
+      process.env = {
+        WILL_BE_DELETED: 'hi',
+        NODE_ENV: 'the-node-env',
+        NODE_PATH: '/the/node/path',
+        ATOM_HOME: '/the/atom/home'
+      }
+
+      const initialProcessEnv = process.env
+
+      await updateProcessEnv({
+        ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT: 'true',
+        PSModulePath: 'C:\\Program Files\\WindowsPowerShell\\Modules;C:\\WINDOWS\\system32\\WindowsPowerShell\\v1.0\\Modules\\',
+        KEY1: 'value1',
+        KEY2: 'value2'
+      })
+      expect(process.env).toEqual({
+        ATOM_DISABLE_SHELLING_OUT_FOR_ENVIRONMENT: 'true',
+        PSModulePath: 'C:\\Program Files\\WindowsPowerShell\\Modules;C:\\WINDOWS\\system32\\WindowsPowerShell\\v1.0\\Modules\\',
+        KEY1: 'value1',
+        KEY2: 'value2',
+        NODE_ENV: 'the-node-env',
+        NODE_PATH: '/the/node/path',
+        ATOM_HOME: '/the/atom/home'
+      })
+
+      // See #11302. On Windows, `process.env` is a magic object that offers
+      // case-insensitive environment variable matching, so we cannot replace it
+      // with another object.
+      expect(process.env).toBe(initialProcessEnv)
+    })
+
     it('allows ATOM_HOME to be overwritten only if the new value is a valid path', async function () {
       let newAtomHomePath = temp.mkdirSync('atom-home')
 
diff --git a/src/update-process-env.js b/src/update-process-env.js
index 6dab00a7d..20d937d96 100644
--- a/src/update-process-env.js
+++ b/src/update-process-env.js
@@ -18,7 +18,7 @@ async function updateProcessEnv (launchEnv) {
   if (launchEnv) {
     if (shouldGetEnvFromShell(launchEnv)) {
       envToAssign = await getEnvFromShell(launchEnv)
-    } else if (launchEnv.PWD) {
+    } else if (launchEnv.PWD || launchEnv.PROMPT || launchEnv.PSModulePath) {
       envToAssign = launchEnv
     }
   }