diff --git a/ioSPI/datasets.py b/ioSPI/datasets.py
index f4aefcf..729db59 100644
--- a/ioSPI/datasets.py
+++ b/ioSPI/datasets.py
@@ -57,7 +57,9 @@ def ls(self):
         """List all files in the project."""
         print(f"Listing files from OSF project: {self.project_id}...")
         # os.system("osf ls")
-        subprocess.check_output(f"osf ls", shell=True, text=True)
+        subprocess.run(
+            f"osf ls", shell=True, text=True, check=True, stdout=subprocess.PIPE
+        )
 
     def download(self, remote_path: str, local_path: str):
         """Download a file from an OSF project and save it locally.
@@ -82,8 +84,12 @@ def download(self, remote_path: str, local_path: str):
         full_remote_path = self.storage + "/" + remote_path
         print(f"Downloading {full_remote_path} to {local_path}...")
         # os.system(f"osf fetch {full_remote_path} {local_path}")
-        subprocess.check_output(
-            f"osf fetch {full_remote_path} {local_path}", shell=True, text=True
+        subprocess.run(
+            f"osf fetch {full_remote_path} {local_path}",
+            shell=True,
+            text=True,
+            check=True,
+            stdout=subprocess.PIPE,
         )
         print("Done!")
 
@@ -114,9 +120,13 @@ def upload(self, local_path: str, remote_path: str):
         full_remote_path = self.storage + "/" + remote_path
         print(f"Uploading {local_path} to {full_remote_path}...")
         # os.system(f"osf upload {local_path} {full_remote_path}")
-        f = subprocess.check_output(
-            f"osf upload {local_path} {full_remote_path}", shell=True, text=True
-        )
+        f = subprocess.run(
+            f"osf upload {local_path} {full_remote_path}",
+            shell=True,
+            text=True,
+            check=True,
+            stdout=subprocess.PIPE,
+        ).stdout
         print(io.StringIO(f).readlines())
         print("Done!")
 
@@ -138,5 +148,11 @@ def remove(self, remote_path: str):
         full_remote_path = self.storage + "/" + remote_path
         print(f"Removing {full_remote_path} in the project...")
         # os.system(f"osf remove {full_remote_path}")
-        subprocess.check_output(f"osf remove {full_remote_path}", shell=True, text=True)
+        subprocess.run(
+            f"osf remove {full_remote_path}",
+            shell=True,
+            text=True,
+            check=True,
+            stdout=subprocess.PIPE,
+        )
         print("Done!")
diff --git a/tests/test_datasets.py b/tests/test_datasets.py
index 244b406..9e776f0 100644
--- a/tests/test_datasets.py
+++ b/tests/test_datasets.py
@@ -55,13 +55,17 @@ def test_constructor_invalid_because_no_token():
 
 def test_upload_valid(setup, set_file_path):
     """Test the upload method."""
-    file_list = subprocess.check_output("osf ls", shell=True, text=True)
+    file_list = subprocess.run(
+        "osf ls", shell=True, text=True, check=True, stdout=subprocess.PIPE
+    ).stdout
     print(io.StringIO(file_list).readlines())
 
     setup.upload(set_file_path[0] + set_file_path[1], set_file_path[1])
     file_exists = False
     # file_list = os.popen("osf ls")
-    file_list = subprocess.check_output("osf ls", shell=True, text=True)
+    file_list = subprocess.run(
+        "osf ls", shell=True, text=True, check=True, stdout=subprocess.PIPE
+    ).stdout
     file_list = io.StringIO(file_list)
     line = file_list.readline()
     while line:
@@ -112,7 +116,9 @@ def test_remove_valid(setup, set_file_path):
     setup.remove(set_file_path[1])
     file_exists = False
     # file_list = os.popen("osf ls")
-    file_list = subprocess.check_output("osf ls", shell=True, text=True)
+    file_list = subprocess.run(
+        "osf ls", shell=True, text=True, check=True, stdout=subprocess.PIPE
+    ).stdout
     file_list = io.StringIO(file_list)
     line = file_list.readline()
     while line: