diff --git a/tests/test_help_banner.py b/tests/test_help_banner.py
index c5d801b23..27d749790 100644
--- a/tests/test_help_banner.py
+++ b/tests/test_help_banner.py
@@ -4,7 +4,10 @@ import sys
 
 def test_help_displays_logo() -> None:
     result = subprocess.run(
-        [sys.executable, "-c", "from codeflash.main import main; main()", "--help"], capture_output=True, text=True
+        [sys.executable, "-c", "from codeflash.main import main; main()", "--help"],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
     )
     assert result.returncode == 0
     assert "codeflash.ai" in result.stdout
@@ -12,7 +15,10 @@ def test_help_displays_logo() -> None:
 
 def test_help_short_flag_displays_logo() -> None:
     result = subprocess.run(
-        [sys.executable, "-c", "from codeflash.main import main; main()", "-h"], capture_output=True, text=True
+        [sys.executable, "-c", "from codeflash.main import main; main()", "-h"],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
     )
     assert result.returncode == 0
     assert "codeflash.ai" in result.stdout