diff --git a/incubation/test_process/lib/src/invoked_process.dart b/incubation/test_process/lib/src/invoked_process.dart
index a36e49b..6546f35 100644
--- a/incubation/test_process/lib/src/invoked_process.dart
+++ b/incubation/test_process/lib/src/invoked_process.dart
@@ -67,6 +67,11 @@ class InvokedProcess {
     }
   }
 
+  /// Close the process stdin.
+  Future<void> closeStdin() async {
+    await _process.stdin.close();
+  }
+
   /// Signal the process.
   bool kill([ProcessSignal signal = ProcessSignal.sigterm]) {
     _killed = true;
diff --git a/incubation/test_process/test/invoked_process_test.dart b/incubation/test_process/test/invoked_process_test.dart
index b4f31f1..d1bacc2 100644
--- a/incubation/test_process/test/invoked_process_test.dart
+++ b/incubation/test_process/test/invoked_process_test.dart
@@ -50,7 +50,7 @@ void main() {
 
       process.write('Hello');
       process.write(' World');
-      await process.kill(); // Force process to complete
+      await process.closeStdin();
       final result = await process.wait();
       expect(result.output().trim(), equals('Hello World'));
     }, timeout: Timeout(Duration(seconds: 5)));
@@ -60,7 +60,7 @@ void main() {
       final process = await factory.command(['cat']).start();
 
       process.write([72, 101, 108, 108, 111]); // "Hello" in bytes
-      await process.kill(); // Force process to complete
+      await process.closeStdin();
       final result = await process.wait();
       expect(result.output().trim(), equals('Hello'));
     }, timeout: Timeout(Duration(seconds: 5)));