diff --git a/tests/test_core.py b/tests/test_core.py
index cd18d69..15bad57 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -17,7 +17,7 @@ class TestCore(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         system = platform.system()
-        cls.target = subprocess.Popen([target_program])
+        cls.target = subprocess.Popen([target_program], stdin=subprocess.PIPE)
         cls.session = frida.attach(cls.target.pid)
 
     @classmethod
diff --git a/tests/test_discoverer.py b/tests/test_discoverer.py
index 7d6ef33..2f85654 100644
--- a/tests/test_discoverer.py
+++ b/tests/test_discoverer.py
@@ -18,7 +18,7 @@ class TestDiscoverer(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         system = platform.system()
-        cls.target = subprocess.Popen([target_program])
+        cls.target = subprocess.Popen([target_program], stdin=subprocess.PIPE)
         cls.session = frida.attach(cls.target.pid)
 
     @classmethod
diff --git a/tests/test_tracer.py b/tests/test_tracer.py
index 26f9d9e..5d1fd37 100644
--- a/tests/test_tracer.py
+++ b/tests/test_tracer.py
@@ -18,7 +18,7 @@ class TestTracer(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         system = platform.system()
-        cls.target = subprocess.Popen([target_program])
+        cls.target = subprocess.Popen([target_program], stdin=subprocess.PIPE)
         cls.session = frida.attach(cls.target.pid)
 
     @classmethod