diff --git a/contributor_stats.py b/contributor_stats.py
index 1200f65..ffd960e 100644
--- a/contributor_stats.py
+++ b/contributor_stats.py
@@ -153,12 +153,10 @@ def get_sponsor_information(contributors: list, token: str, ghe: str) -> list:
         variables = {"username": contributor.username}
 
         # Send the GraphQL request
-        api_endpoint = (
-            f"{ghe}/api/v3".removeprefix("https://") if ghe else "api.github.com"
-        )
+        api_endpoint = f"{ghe}/api/v3" if ghe else "https://api.github.com"
         headers = {"Authorization": f"Bearer {token}"}
         response = requests.post(
-            f"https://{api_endpoint}/graphql",
+            f"{api_endpoint}/graphql",
             json={"query": query, "variables": variables},
             headers=headers,
             timeout=60,
@@ -170,10 +168,9 @@ def get_sponsor_information(contributors: list, token: str, ghe: str) -> list:
 
         data = response.json()["data"]
 
+        endpoint = ghe if ghe else "https://github.com"
         # if the user has a sponsor page, add it to the contributor object
         if data["repositoryOwner"]["hasSponsorsListing"]:
-            contributor.sponsor_info = (
-                f"https://{api_endpoint}/sponsors/{contributor.username}"
-            )
+            contributor.sponsor_info = f"{endpoint}/sponsors/{contributor.username}"
 
     return contributors
diff --git a/contributors.py b/contributors.py
index 42491c0..96cdd86 100644
--- a/contributors.py
+++ b/contributors.py
@@ -173,11 +173,11 @@ def get_contributors(repo: object, start_date: str, end_date: str, ghe: str):
                     continue
 
             # Store the contributor information in a ContributorStats object
-            api_endpoint = ghe.removeprefix("https://") if ghe else "github.com"
+            endpoint = ghe if ghe else "https://github.com"
             if start_date and end_date:
-                commit_url = f"https://{api_endpoint}/{repo.full_name}/commits?author={user.login}&since={start_date}&until={end_date}"
+                commit_url = f"{endpoint}/{repo.full_name}/commits?author={user.login}&since={start_date}&until={end_date}"
             else:
-                commit_url = f"https://{api_endpoint}/{repo.full_name}/commits?author={user.login}"
+                commit_url = f"{endpoint}/{repo.full_name}/commits?author={user.login}"
             contributor = contributor_stats.ContributorStats(
                 user.login,
                 False,
diff --git a/markdown.py b/markdown.py
index a32328a..1acda35 100644
--- a/markdown.py
+++ b/markdown.py
@@ -185,10 +185,8 @@ def get_contributor_table(
             for url in commit_url_list:
                 url = url.strip()
                 # get the organization and repository name from the url ie. org1/repo2 from https://github.com/org1/repo2/commits?author-zkoppert
-                api_endpoint = ghe.removeprefix("https://") if ghe else "github.com"
-                org_repo_link_name = url.split("/commits")[0].split(f"{api_endpoint}/")[
-                    1
-                ]
+                endpoint = ghe.removeprefix("https://") if ghe else "github.com"
+                org_repo_link_name = url.split("/commits")[0].split(f"{endpoint}/")[1]
                 url = f"[{org_repo_link_name}]({url})"
                 commit_urls += f"{url}, "
         new_contributor = collaborator.new_contributor
diff --git a/test_contributor_stats.py b/test_contributor_stats.py
index adcd0a5..69ce9ce 100644
--- a/test_contributor_stats.py
+++ b/test_contributor_stats.py
@@ -1,8 +1,14 @@
 """This module contains the tests for the ContributorStats class."""
 
 import unittest
+from unittest.mock import MagicMock, patch
 
-from contributor_stats import ContributorStats, is_new_contributor, merge_contributors
+from contributor_stats import (
+    ContributorStats,
+    get_sponsor_information,
+    is_new_contributor,
+    merge_contributors,
+)
 
 
 class TestContributorStats(unittest.TestCase):
@@ -28,7 +34,7 @@ def test_init(self):
         Test the __init__ method of the ContributorStats class.
         """
         self.assertEqual(self.contributor.username, "zkoppert")
-        self.assertEqual(self.contributor.new_contributor, False)
+        self.assertFalse(self.contributor.new_contributor)
         self.assertEqual(
             self.contributor.avatar_url,
             "https://avatars.githubusercontent.com/u/29484535?v=4",
@@ -95,7 +101,7 @@ def test_merge_contributors(self):
 
         result = merge_contributors(all_contributors)
 
-        self.assertTrue(expected_result == result)
+        self.assertEqual(expected_result, result)
 
     def test_is_new_contributor_true(self):
         """
@@ -154,5 +160,59 @@ def test_is_new_contributor_false(self):
         self.assertFalse(result)
 
 
+class TestSponsorInfo(unittest.TestCase):
+    @patch("requests.post")
+    def test_fetch_sponsor_info(self, mock_post):
+        # Mock response data
+        mock_response = MagicMock()
+        mock_response.status_code = 200
+        mock_response.json.return_value = {
+            "data": {"repositoryOwner": {"hasSponsorsListing": True}}
+        }
+        mock_post.return_value = mock_response
+
+        # Mock contributors
+        user = "user1"
+        returning_contributors = [
+            ContributorStats(
+                username=user,
+                new_contributor=False,
+                avatar_url="https://avatars.githubusercontent.com/u/",
+                contribution_count="100",
+                commit_url="url1",
+                sponsor_info="",
+            ),
+        ]
+
+        # Test parameters
+        ghe = ""
+        token = "token"
+
+        # Call the function
+        result = get_sponsor_information(returning_contributors, token, ghe)
+
+        # Assertions
+        self.assertEqual(result[0].sponsor_info, "https://github.com/sponsors/user1")
+
+        # Ensure the post request was called with the correct parameters
+        mock_post.assert_called_once_with(
+            "https://api.github.com/graphql",
+            json={
+                "query": """
+        query($username: String!){
+            repositoryOwner(login: $username) {
+                ... on User {
+                hasSponsorsListing
+                }
+            }
+        }
+        """,
+                "variables": {"username": "user1"},
+            },
+            headers={"Authorization": "Bearer token"},
+            timeout=60,
+        )
+
+
 if __name__ == "__main__":
     unittest.main()