diff --git a/tests/e2e/select-input-source.swift b/tests/e2e/select-input-source.swift
new file mode 100644
index 00000000000..fe8ecf52258
--- /dev/null
+++ b/tests/e2e/select-input-source.swift
@@ -0,0 +1,14 @@
+import Carbon
+
+guard CommandLine.arguments.count == 2 else {
+  exit(2)
+}
+
+let properties = [kTISPropertyInputSourceID: CommandLine.arguments[1] as CFString] as CFDictionary
+let sources = TISCreateInputSourceList(properties, true).takeRetainedValue() as! [TISInputSource]
+guard let source = sources.first else {
+  exit(3)
+}
+
+TISEnableInputSource(source)
+exit(TISSelectInputSource(source) == noErr ? 0 : 4)
diff --git a/tests/e2e/terminal-macos-automatic-period-native.spec.ts b/tests/e2e/terminal-macos-automatic-period-native.spec.ts
index 18b1d0d369f..be0e735b18d 100644
--- a/tests/e2e/terminal-macos-automatic-period-native.spec.ts
+++ b/tests/e2e/terminal-macos-automatic-period-native.spec.ts
@@ -71,7 +71,7 @@ test.describe('Native macOS automatic period substitution @headful', () => {
       await startTerminalImeByteReader(orcaPage, ptyId, hangulReader)
       await focusActiveTerminalInput(orcaPage)
       await installTerminalImeBoundaryProbe(orcaPage)
-      execFileSync('swift', ['.tmp/select-input-source.swift', KOREAN_ID])
+      execFileSync('swift', ['tests/e2e/select-input-source.swift', KOREAN_ID])
       await waitForInputSource(orcaPage, KOREAN_ID)
 
       typePhysicalKeys(electronApp.process().pid!, [2, 40, 49])
@@ -84,7 +84,7 @@ test.describe('Native macOS automatic period substitution @headful', () => {
       await startTerminalImeByteReader(orcaPage, ptyId, abcReader)
       await focusActiveTerminalInput(orcaPage)
 
-      execFileSync('swift', ['.tmp/select-input-source.swift', ABC_ID])
+      execFileSync('swift', ['tests/e2e/select-input-source.swift', ABC_ID])
       await waitForInputSource(orcaPage, ABC_ID)
       typePhysicalKeys(electronApp.process().pid!, [47, 49, 36])
 
@@ -102,7 +102,7 @@ test.describe('Native macOS automatic period substitution @headful', () => {
         { abcPty, automaticPeriodPreference: true, hangulBeforeEnter, hangulPty }
       )
     } finally {
-      execFileSync('swift', ['.tmp/select-input-source.swift', ABC_ID])
+      execFileSync('swift', ['tests/e2e/select-input-source.swift', ABC_ID])
       await disposeTerminalImeBoundaryProbe(orcaPage).catch(() => undefined)
       removeTerminalImeByteReader(hangulReader)
       removeTerminalImeByteReader(abcReader)
diff --git a/tests/e2e/terminal-macos-cangjie-native.spec.ts b/tests/e2e/terminal-macos-cangjie-native.spec.ts
index 50b5533475e..8356a8b85b6 100644
--- a/tests/e2e/terminal-macos-cangjie-native.spec.ts
+++ b/tests/e2e/terminal-macos-cangjie-native.spec.ts
@@ -69,7 +69,7 @@ function typeKeyCodes(processId: number, keyCodes: readonly number[]): void {
 }
 
 function selectInputSource(inputSourceId: string): void {
-  execFileSync('swift', ['.tmp/select-input-source.swift', inputSourceId])
+  execFileSync('swift', ['tests/e2e/select-input-source.swift', inputSourceId])
 }
 
 async function readActiveComposition(page: Page): Promise<string | null> {
diff --git a/tests/e2e/terminal-macos-korean-chord-commit-native.spec.ts b/tests/e2e/terminal-macos-korean-chord-commit-native.spec.ts
index 349b4c53bcf..ba2080938ba 100644
--- a/tests/e2e/terminal-macos-korean-chord-commit-native.spec.ts
+++ b/tests/e2e/terminal-macos-korean-chord-commit-native.spec.ts
@@ -33,7 +33,7 @@ import {
  */
 
 const TWO_SET_KOREAN_ID = 'com.apple.inputmethod.Korean.2SetKorean'
-const SELECT_INPUT_SOURCE = path.resolve(__dirname, '../../.tmp/select-input-source.swift')
+const SELECT_INPUT_SOURCE = path.resolve(__dirname, 'select-input-source.swift')
 
 // 2-Set Korean: ㅎ = key code 5, ㅏ = key code 40, Space = 49. Three `하` separated by spaces,
 // matching the byte expectations preserved below.
diff --git a/tests/e2e/terminal-macos-pinyin-native.spec.ts b/tests/e2e/terminal-macos-pinyin-native.spec.ts
index e3514d81c3f..30f79c47d5b 100644
--- a/tests/e2e/terminal-macos-pinyin-native.spec.ts
+++ b/tests/e2e/terminal-macos-pinyin-native.spec.ts
@@ -59,7 +59,7 @@ function typeKeyCodes(processId: number, keyCodes: readonly number[]): void {
 }
 
 function selectInputSource(inputSourceId: string): void {
-  execFileSync('swift', ['.tmp/select-input-source.swift', inputSourceId])
+  execFileSync('swift', ['tests/e2e/select-input-source.swift', inputSourceId])
 }
 
 async function readActiveComposition(page: Page): Promise<string | null> {
diff --git a/tests/e2e/terminal-macos-vietnamese-native.spec.ts b/tests/e2e/terminal-macos-vietnamese-native.spec.ts
index 55d04fd4d46..53080070a6e 100644
--- a/tests/e2e/terminal-macos-vietnamese-native.spec.ts
+++ b/tests/e2e/terminal-macos-vietnamese-native.spec.ts
@@ -57,7 +57,7 @@ function typeKeyCodes(processId: number, keyCodes: readonly number[]): void {
 }
 
 function selectInputSource(inputSourceId: string): void {
-  execFileSync('swift', ['.tmp/select-input-source.swift', inputSourceId])
+  execFileSync('swift', ['tests/e2e/select-input-source.swift', inputSourceId])
 }
 
 test.describe('Native macOS Vietnamese terminal input @headful', () => {