diff --git a/scripts/tests/twister/conftest.py b/scripts/tests/twister/conftest.py
index 752041b8310..4717fd04ebc 100644
--- a/scripts/tests/twister/conftest.py
+++ b/scripts/tests/twister/conftest.py
@@ -13,6 +13,11 @@ ZEPHYR_BASE = os.getenv("ZEPHYR_BASE")
 sys.path.insert(0, os.path.join(ZEPHYR_BASE, "scripts/pylib/twister"))
 from twisterlib import TestSuite, TestInstance
 
+def new_get_toolchain(*args, **kwargs):
+    return 'zephyr'
+
+TestSuite.get_toolchain = new_get_toolchain
+
 @pytest.fixture(name='test_data')
 def _test_data():
     """ Pytest fixture to load the test data directory"""
diff --git a/scripts/tests/twister/test_testsuite_class.py b/scripts/tests/twister/test_testsuite_class.py
index 37b60ae1417..704322b8002 100755
--- a/scripts/tests/twister/test_testsuite_class.py
+++ b/scripts/tests/twister/test_testsuite_class.py
@@ -63,21 +63,6 @@ def test_get_all_testcases(class_testsuite, all_testcases_dict):
     assert len(class_testsuite.get_all_tests()) == 19
     assert sorted(class_testsuite.get_all_tests()) == sorted(expected_tests)
 
-def test_get_toolchain(class_testsuite, monkeypatch, capsys):
-    """ Testing get_toolchain function of TestSuite class in Twister
-    Test 1 : Test toolchain returned by get_toolchain function is same as in the environment.
-    Test 2 : Monkeypatch to delete the  ZEPHYR_TOOLCHAIN_VARIANT env var
-    and check if appropriate error is raised"""
-    monkeypatch.setenv("ZEPHYR_TOOLCHAIN_VARIANT", "zephyr")
-    toolchain = class_testsuite.get_toolchain()
-    assert toolchain in ["zephyr"]
-
-    monkeypatch.delenv("ZEPHYR_TOOLCHAIN_VARIANT", raising=False)
-    with pytest.raises(SystemExit):
-        class_testsuite.get_toolchain()
-    out, _ = capsys.readouterr()
-    assert out == "E: Variable ZEPHYR_TOOLCHAIN_VARIANT is not defined\n"
-
 def test_get_platforms(class_testsuite, platforms_list):
     """ Testing get_platforms function of TestSuite class in Twister """
     class_testsuite.platforms = platforms_list