diff --git a/projects/etos_suite_runner/setup.cfg b/projects/etos_suite_runner/setup.cfg
index 15bc0c5..30f9c78 100644
--- a/projects/etos_suite_runner/setup.cfg
+++ b/projects/etos_suite_runner/setup.cfg
@@ -28,8 +28,8 @@ install_requires =
     PyScaffold==3.2.3
     packageurl-python~=0.11
     cryptography>=42.0.4,<43.0.0
-    etos_lib==4.3.0
-    etos_environment_provider~=4.3
+    #etos_lib==4.3.1
+    #etos_environment_provider~=4.3
     opentelemetry-api~=1.21
     opentelemetry-exporter-otlp~=1.21
     opentelemetry-sdk~=1.21
diff --git a/projects/etos_suite_runner/src/etos_suite_runner/esr.py b/projects/etos_suite_runner/src/etos_suite_runner/esr.py
index 9fdbe21..4c004f4 100644
--- a/projects/etos_suite_runner/src/etos_suite_runner/esr.py
+++ b/projects/etos_suite_runner/src/etos_suite_runner/esr.py
@@ -67,9 +67,6 @@ def __init__(self) -> None:
             int(os.getenv("ESR_WAIT_FOR_ENVIRONMENT_TIMEOUT")),
         )
 
-        self.otel_context = None
-        self.otel_context_token = None
-
     def __del__(self):
         """Destructor."""
         if self.otel_context_token is not None:
@@ -120,7 +117,7 @@ def _request_environment(self, ids: list[str], otel_context_carrier: dict) -> No
         :param otel_context_carrier: a dict carrying current OpenTelemetry context.
         """
         # OpenTelemetry contexts aren't propagated to threads automatically.
-        # For this reason otel_context needs to be restantiated due to
+        # For this reason otel_context needs to be reinstantiated due to
         # this method running in a separate thread.
         otel_context = TraceContextTextMapPropagator().extract(carrier=otel_context_carrier)
         otel_context_token = opentelemetry.context.attach(otel_context)
diff --git a/projects/etos_suite_runner/src/etos_suite_runner/lib/suite.py b/projects/etos_suite_runner/src/etos_suite_runner/lib/suite.py
index c27036d..452b29b 100644
--- a/projects/etos_suite_runner/src/etos_suite_runner/lib/suite.py
+++ b/projects/etos_suite_runner/src/etos_suite_runner/lib/suite.py
@@ -18,7 +18,7 @@
 import logging
 import threading
 import time
-from typing import Iterator
+from typing import Iterator, Union
 
 from eiffellib.events import EiffelTestSuiteStartedEvent
 from environment_provider.lib.registry import ProviderRegistry
@@ -202,8 +202,7 @@ def __init__(
         etos: ETOS,
         params: ESRParameters,
         suite: dict,
-        # pylint: disable=dangerous-default-value
-        otel_context_carrier: dict = {},
+        otel_context_carrier: Union[dict, None] = None,
     ) -> None:
         """Initialize a TestSuite instance."""
         self.etos = etos
@@ -213,6 +212,9 @@ def __init__(
         self.logger.addFilter(DuplicateFilter(self.logger))
         self.sub_suites = []
 
+        if otel_context_carrier is None:
+            otel_context_carrier = {}
+
         self.otel_context_carrier = otel_context_carrier
         self.otel_context = TraceContextTextMapPropagator().extract(
             carrier=self.otel_context_carrier