diff --git a/tests/lib/bedrock_live.py b/tests/lib/bedrock_live.py
index 7ec30b9c78..f05ddd8c5a 100644
--- a/tests/lib/bedrock_live.py
+++ b/tests/lib/bedrock_live.py
@@ -43,7 +43,7 @@ def _load_env_file() -> None:
             raise RuntimeError(f"BEDROCK_LIVE_ENV_FILE does not exist: {path}")
         return
 
-    for line_number, raw_line in enumerate(path.read_text().splitlines(), start=1):
+    for line_number, raw_line in enumerate(path.read_text(encoding="utf-8").splitlines(), start=1):
         line = raw_line.strip()
         if not line or line.startswith("#"):
             continue
diff --git a/tests/lib/test_bedrock_auth_conformance.py b/tests/lib/test_bedrock_auth_conformance.py
index 829ea5b151..1d9591a812 100644
--- a/tests/lib/test_bedrock_auth_conformance.py
+++ b/tests/lib/test_bedrock_auth_conformance.py
@@ -22,9 +22,9 @@
 FIXTURE_PATH = Path(__file__).parents[1] / "fixtures" / "bedrock_auth" / "v1" / "cases.json"
 SCHEMA_PATH = FIXTURE_PATH.with_name("schema.json")
 SHARED_SIGV4_FIXTURE_PATH = Path(__file__).parents[1] / "fixtures" / "bedrock" / "v1" / "sigv4.json"
-FIXTURES = cast(dict[str, Any], json.loads(FIXTURE_PATH.read_text()))
-SCHEMA = cast(dict[str, Any], json.loads(SCHEMA_PATH.read_text()))
-SHARED_SIGV4_FIXTURE = cast(dict[str, Any], json.loads(SHARED_SIGV4_FIXTURE_PATH.read_text()))
+FIXTURES = cast(dict[str, Any], json.loads(FIXTURE_PATH.read_text(encoding="utf-8")))
+SCHEMA = cast(dict[str, Any], json.loads(SCHEMA_PATH.read_text(encoding="utf-8")))
+SHARED_SIGV4_FIXTURE = cast(dict[str, Any], json.loads(SHARED_SIGV4_FIXTURE_PATH.read_text(encoding="utf-8")))
 
 # This is deliberately specific to the small, checked-in v1 fixture contract.
 _REQUIRED_CASE_FIELDS: dict[str, dict[str, list[str]]] = {