diff --git a/testcases/consistency/test_consistency.py b/testcases/consistency/test_consistency.py
index 776b9c4..dfeac79 100755
--- a/testcases/consistency/test_consistency.py
+++ b/testcases/consistency/test_consistency.py
@@ -11,10 +11,10 @@
 import pytest
 import typing
 
-test_string = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
 
-# Use a global test_info to get a better output when running pytest
-test_info: typing.Dict[str, typing.Any] = {}
+test_string = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+test_info = os.getenv("TEST_INFO_FILE")
+test_info_dict = testhelper.read_yaml(test_info)
 
 
 def file_content_check(f: typing.IO, comp_str: str) -> bool:
@@ -23,7 +23,7 @@ def file_content_check(f: typing.IO, comp_str: str) -> bool:
 
 
 def consistency_check(mount_point: str, ipaddr: str, share_name: str) -> None:
-    mount_params = testhelper.get_mount_parameters(test_info, share_name)
+    mount_params = testhelper.get_mount_parameters(test_info_dict, share_name)
     mount_params["host"] = ipaddr
     try:
         test_file = testhelper.get_tmp_file(mount_point)
@@ -55,22 +55,19 @@ def consistency_check(mount_point: str, ipaddr: str, share_name: str) -> None:
 
 
 def generate_consistency_check(
-    test_info_file: typing.Optional[str],
+    test_info_file: dict,
 ) -> typing.List[typing.Tuple[str, str]]:
-    global test_info
     if not test_info_file:
         return []
-    test_info = testhelper.read_yaml(test_info_file)
     arr = []
-    for ipaddr in test_info["public_interfaces"]:
-        for share_name in test_info["exported_sharenames"]:
+    for ipaddr in test_info_file["public_interfaces"]:
+        for share_name in test_info_file["exported_sharenames"]:
             arr.append((ipaddr, share_name))
     return arr
 
 
 @pytest.mark.parametrize(
-    "ipaddr,share_name",
-    generate_consistency_check(os.getenv("TEST_INFO_FILE")),
+    "ipaddr,share_name", generate_consistency_check(test_info_dict)
 )
 def test_consistency(ipaddr: str, share_name: str) -> None:
     tmp_root = testhelper.get_tmp_root()
diff --git a/testcases/mount/test_mount.py b/testcases/mount/test_mount.py
index d0bba9f..320ff2a 100755
--- a/testcases/mount/test_mount.py
+++ b/testcases/mount/test_mount.py
@@ -12,12 +12,12 @@
 from .mount_io import check_io_consistency
 from .mount_dbm import check_dbm_consistency
 
-# Use a global test_info to get a better output when running pytest
-test_info: typing.Dict[str, typing.Any] = {}
+test_info = os.getenv("TEST_INFO_FILE")
+test_info_dict = testhelper.read_yaml(test_info)
 
 
 def mount_check(ipaddr: str, share_name: str) -> None:
-    mount_params = testhelper.get_mount_parameters(test_info, share_name)
+    mount_params = testhelper.get_mount_parameters(test_info_dict, share_name)
     mount_params["host"] = ipaddr
     tmp_root = testhelper.get_tmp_root()
     mount_point = testhelper.get_tmp_mount_point(tmp_root)
@@ -38,21 +38,19 @@ def mount_check(ipaddr: str, share_name: str) -> None:
 
 
 def generate_mount_check(
-    test_info_file: typing.Optional[str],
+    test_info_file: dict,
 ) -> typing.List[typing.Tuple[str, str]]:
-    global test_info
     if not test_info_file:
         return []
-    test_info = testhelper.read_yaml(test_info_file)
     arr = []
-    for ipaddr in test_info["public_interfaces"]:
-        for share_name in test_info["exported_sharenames"]:
+    for ipaddr in test_info_file["public_interfaces"]:
+        for share_name in test_info_file["exported_sharenames"]:
             arr.append((ipaddr, share_name))
     return arr
 
 
 @pytest.mark.parametrize(
-    "ipaddr,share_name", generate_mount_check(os.getenv("TEST_INFO_FILE"))
+    "ipaddr,share_name", generate_mount_check(test_info_dict)
 )
 def test_mount(ipaddr: str, share_name: str) -> None:
     mount_check(ipaddr, share_name)
diff --git a/testcases/smbtorture/test_smbtorture.py b/testcases/smbtorture/test_smbtorture.py
index 77cfa03..a98dd15 100755
--- a/testcases/smbtorture/test_smbtorture.py
+++ b/testcases/smbtorture/test_smbtorture.py
@@ -15,14 +15,16 @@
 format_subunit_exec = script_root + "/selftest/format-subunit"
 smbtorture_tests_file = script_root + "/smbtorture-tests-info.yml"
 
-test_info: typing.Dict[str, typing.Any] = {}
+test_info = os.getenv("TEST_INFO_FILE")
+test_info_dict = testhelper.read_yaml(test_info)
+
 # Temp filename containing the output of run commands.
 output = testhelper.get_tmp_file("/tmp")
 
 
 def smbtorture(share_name: str, test: str, tmp_output: str) -> bool:
     # build smbtorture command
-    mount_params = testhelper.get_mount_parameters(test_info, share_name)
+    mount_params = testhelper.get_mount_parameters(test_info_dict, share_name)
     smbtorture_cmd = [
         smbtorture_exec,
         "--fullname",
@@ -48,7 +50,7 @@ def smbtorture(share_name: str, test: str, tmp_output: str) -> bool:
             "--expected-failures=" + script_root + "/selftest/" + filter
         )
     flapping_list = ["flapping", "flapping.d"]
-    test_backend = test_info.get("test_backend")
+    test_backend = test_info_dict.get("test_backend")
     if test_backend is not None:
         flapping_file = "flapping." + test_backend
         flapping_file_path = os.path.join(
@@ -114,25 +116,17 @@ def list_smbtorture_tests():
     return smbtorture_info
 
 
-def generate_smbtorture_tests(
-    test_info_file: typing.Optional[str],
-) -> typing.List[typing.Tuple[str, str]]:
-    global test_info
-    if not test_info_file:
-        return []
-    test_info = testhelper.read_yaml(test_info_file)
+def generate_smbtorture_tests() -> typing.List[typing.Tuple[str, str]]:
     smbtorture_info = list_smbtorture_tests()
     arr = []
-    for sharenum in range(testhelper.get_num_shares(test_info)):
-        share_name = testhelper.get_share(test_info, sharenum)
+    for sharenum in range(testhelper.get_num_shares(test_info_dict)):
+        share_name = testhelper.get_share(test_info_dict, sharenum)
         for torture_test in smbtorture_info:
             arr.append((share_name, torture_test))
     return arr
 
 
-@pytest.mark.parametrize(
-    "share_name,test", generate_smbtorture_tests(os.getenv("TEST_INFO_FILE"))
-)
+@pytest.mark.parametrize("share_name,test", generate_smbtorture_tests())
 def test_smbtorture(share_name: str, test: str) -> None:
     ret = smbtorture(share_name, test, output)
     if os.path.exists(output):
diff --git a/testhelper/testhelper.py b/testhelper/testhelper.py
index 935ee02..a3d4876 100644
--- a/testhelper/testhelper.py
+++ b/testhelper/testhelper.py
@@ -3,16 +3,16 @@
 import random
 
 
-def read_yaml(file: str) -> dict:
+def read_yaml(test_info):
     """Returns a dict containing the contents of the yaml file.
 
     Parameters:
-    arg1: filename of yaml file
+    test_info: filename of yaml file.
 
     Returns:
-    dict: parsed contents of a yaml file
+    dict: The parsed test information yml as a dictionary.
     """
-    with open(file) as f:
+    with open(test_info) as f:
         test_info = yaml.load(f, Loader=yaml.FullLoader)
     return test_info
 
@@ -81,7 +81,7 @@ def get_mount_parameters(
     share: The share for which to get the mount_params
     combonum: The combination number to use.
     """
-    if combonum > get_total_mount_parameter_combinations(test_info):
+    if combonum >= get_total_mount_parameter_combinations(test_info):
         assert False, "Invalid combination number"
     num_public = int(combonum / len(test_info["test_users"]))
     num_users = combonum % len(test_info["test_users"])
@@ -113,7 +113,7 @@ def get_share(test_info: dict, share_num: int) -> str:
     share_num: The index within the exported sharenames list
 
     Returns:
-    str: exported sharename in index share_num
+    str: exported sharename at index share_num
     """
     return test_info["exported_sharenames"][share_num]