diff --git a/tests/tools/test_transcription_tools.py b/tests/tools/test_transcription_tools.py
index c5e39728c403..ed20bd3aa991 100644
--- a/tests/tools/test_transcription_tools.py
+++ b/tests/tools/test_transcription_tools.py
@@ -510,11 +510,17 @@ class TestTranscribeLocalCommand:
 
         captured = {}
 
+        class _Stream:
+            def read(self, size):
+                return ""
+
         class Proc:
             returncode = 0
+            stdout = _Stream()
+            stderr = _Stream()
 
-            def communicate(self, timeout=None):
-                return "", ""
+            def wait(self, timeout=None):
+                return 0
 
         def fake_popen(command, **kwargs):
             captured["env"] = kwargs["env"]
@@ -2198,6 +2204,7 @@ class TestShellSafety:
             "--output_dir",
             str(output_dir),
         ]
+        assert invocation["kwargs"].pop("env") is not None
         assert invocation["kwargs"] == {
             "check": True,
             "capture_output": True,
diff --git a/tests/tools/test_tts_command_providers.py b/tests/tools/test_tts_command_providers.py
index c096487bc9a7..5b5701c0d829 100644
--- a/tests/tools/test_tts_command_providers.py
+++ b/tests/tools/test_tts_command_providers.py
@@ -134,11 +134,17 @@ class TestCommandTtsEnv:
 
         captured = {}
 
+        class _Stream:
+            def read(self, size):
+                return ""
+
         class Proc:
             returncode = 0
+            stdout = _Stream()
+            stderr = _Stream()
 
-            def communicate(self, timeout=None):
-                return "", ""
+            def wait(self, timeout=None):
+                return 0
 
         def fake_popen(command, **kwargs):
             captured["env"] = kwargs["env"]