diff --git a/ols/constants.py b/ols/constants.py
index ecf7e902..6d8dd5a8 100644
--- a/ols/constants.py
+++ b/ols/constants.py
@@ -218,3 +218,7 @@ class GenericLLMParameters:
 
 # Default configuration file name
 DEFAULT_CONFIGURATION_FILE = "rcsconfig.yaml"
+
+# Environment variable containing configuration file name to override default
+# configuration file
+CONFIGURATION_FILE_NAME_ENV_VARIABLE = "RCS_CONFIG_FILE"
diff --git a/ols/user_data_collection/data_collector.py b/ols/user_data_collection/data_collector.py
index 1c362467..581e4a47 100644
--- a/ols/user_data_collection/data_collector.py
+++ b/ols/user_data_collection/data_collector.py
@@ -27,9 +27,14 @@
 
 # initialize config
 from ols import config  # pylint: disable=C0413
-from ols.constants import DEFAULT_CONFIGURATION_FILE  # pylint: disable=C0413
+from ols.constants import (  # pylint: disable=C0413
+    CONFIGURATION_FILE_NAME_ENV_VARIABLE,
+    DEFAULT_CONFIGURATION_FILE,
+)
 
-cfg_file = os.environ.get("RCS_CONFIG_FILE", DEFAULT_CONFIGURATION_FILE)
+cfg_file = os.environ.get(
+    CONFIGURATION_FILE_NAME_ENV_VARIABLE, DEFAULT_CONFIGURATION_FILE
+)
 config.reload_from_yaml_file(
     cfg_file, ignore_llm_secrets=True, ignore_missing_certs=True
 )
diff --git a/runner.py b/runner.py
index 5f650a4a..43c167c2 100644
--- a/runner.py
+++ b/runner.py
@@ -6,7 +6,10 @@
 import threading
 from pathlib import Path
 
-from ols.constants import DEFAULT_CONFIGURATION_FILE
+from ols.constants import (
+    CONFIGURATION_FILE_NAME_ENV_VARIABLE,
+    DEFAULT_CONFIGURATION_FILE,
+)
 from ols.runners.uvicorn import start_uvicorn
 from ols.src.auth.auth import use_k8s_auth
 from ols.utils.certificates import generate_certificates_file
@@ -35,7 +38,9 @@ def load_index():
     # else via our code before other envs are set (mainly the gradio).
     from ols import config
 
-    cfg_file = os.environ.get("RCS_CONFIG_FILE", DEFAULT_CONFIGURATION_FILE)
+    cfg_file = os.environ.get(
+        CONFIGURATION_FILE_NAME_ENV_VARIABLE, DEFAULT_CONFIGURATION_FILE
+    )
     config.reload_from_yaml_file(cfg_file)
 
     configure_logging(config.ols_config.logging_config)
diff --git a/scripts/generate_openapi_schema.py b/scripts/generate_openapi_schema.py
index 9f60e0e6..c1afb5f2 100644
--- a/scripts/generate_openapi_schema.py
+++ b/scripts/generate_openapi_schema.py
@@ -13,10 +13,15 @@
 )
 
 from ols import config  # pylint: disable=C0413
-from ols.constants import DEFAULT_CONFIGURATION_FILE
+from ols.constants import (
+    CONFIGURATION_FILE_NAME_ENV_VARIABLE,
+    DEFAULT_CONFIGURATION_FILE,
+)
 
 # it is needed to read proper configuration in order to start the app to generate schema
-cfg_file = os.environ.get("RCS_CONFIG_FILE", "scripts/" + DEFAULT_CONFIGURATION_FILE)
+cfg_file = os.environ.get(
+    CONFIGURATION_FILE_NAME_ENV_VARIABLE, "scripts/" + DEFAULT_CONFIGURATION_FILE
+)
 config.reload_from_yaml_file(cfg_file)
 
 from ols.app.main import app  # noqa: E402  pylint: disable=C0413
diff --git a/tests/integration/test_liveness_readiness.py b/tests/integration/test_liveness_readiness.py
index f0e7ad03..4fbb6761 100644
--- a/tests/integration/test_liveness_readiness.py
+++ b/tests/integration/test_liveness_readiness.py
@@ -8,6 +8,7 @@
 from fastapi.testclient import TestClient
 
 from ols import config
+from ols.constants import CONFIGURATION_FILE_NAME_ENV_VARIABLE
 
 client: TestClient
 
@@ -16,7 +17,10 @@
 # config file before we import anything from main.py
 @pytest.fixture(scope="function", autouse=True)
 @patch.dict(
-    os.environ, {"RCS_CONFIG_FILE": "tests/config/config_for_integration_tests.yaml"}
+    os.environ,
+    {
+        CONFIGURATION_FILE_NAME_ENV_VARIABLE: "tests/config/config_for_integration_tests.yaml"
+    },
 )
 def _setup():
     """Setups the test client."""
diff --git a/tests/integration/test_metrics.py b/tests/integration/test_metrics.py
index 75154aa2..527eaf18 100644
--- a/tests/integration/test_metrics.py
+++ b/tests/integration/test_metrics.py
@@ -11,6 +11,7 @@
 
 from ols import config
 from ols.app.models.config import LoggingConfig
+from ols.constants import CONFIGURATION_FILE_NAME_ENV_VARIABLE
 from ols.utils.logging_configurator import configure_logging
 
 client: TestClient
@@ -31,7 +32,10 @@
 # config file before we import anything from main.py
 @pytest.fixture(scope="function", autouse=True)
 @patch.dict(
-    os.environ, {"RCS_CONFIG_FILE": "tests/config/config_for_integration_tests.yaml"}
+    os.environ,
+    {
+        CONFIGURATION_FILE_NAME_ENV_VARIABLE: "tests/config/config_for_integration_tests.yaml"
+    },
 )
 def _setup():
     """Setups the test client."""
diff --git a/tests/integration/test_openapi.py b/tests/integration/test_openapi.py
index 330dfb0b..5504fc57 100644
--- a/tests/integration/test_openapi.py
+++ b/tests/integration/test_openapi.py
@@ -9,6 +9,7 @@
 from fastapi.testclient import TestClient
 
 from ols import config
+from ols.constants import CONFIGURATION_FILE_NAME_ENV_VARIABLE
 
 client: TestClient
 
@@ -17,7 +18,10 @@
 # config file before we import anything from main.py
 @pytest.fixture(scope="function", autouse=True)
 @patch.dict(
-    os.environ, {"RCS_CONFIG_FILE": "tests/config/config_for_integration_tests.yaml"}
+    os.environ,
+    {
+        CONFIGURATION_FILE_NAME_ENV_VARIABLE: "tests/config/config_for_integration_tests.yaml"
+    },
 )
 def _setup():
     """Setups the test client."""