diff --git a/edgetest/utils.py b/edgetest/utils.py
index fc2aaf9..03b6149 100644
--- a/edgetest/utils.py
+++ b/edgetest/utils.py
@@ -40,12 +40,14 @@ def _run_command(*args) -> Tuple[str, int]:
         Error raised when the command is not successfully executed.
     """
     LOG.debug(f"Running the following command: \n\n {' '.join(args)}")
-    popen = Popen(args, stdout=PIPE, universal_newlines=True)
-    out, _ = popen.communicate()
+    popen = Popen(args, stdout=PIPE, stderr=PIPE, universal_newlines=True)
+    out, err = popen.communicate()
     if popen.returncode:
         raise RuntimeError(
-            f"Unable to run the following command: \n\n {' '.join(args)}"
-        )
+            f"Unable to run the following command: \n\n {' '.join(args)} \n\n"
+            f"Returned the following stdout: \n\n {out} \n\n"
+            f"Returned the following stderr: \n\n {err} \n\n"
+        ) from None
 
     return out, popen.returncode
 
diff --git a/tests/test_core.py b/tests/test_core.py
index a19dd6d..18d317f 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -72,6 +72,7 @@ def test_basic_setup(mock_popen, mock_path, tmpdir, plugin_manager):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -174,6 +175,7 @@ def test_setup_extras(mock_popen, mock_path, tmpdir, plugin_manager):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", ".[tests, complete]"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -217,11 +219,13 @@ def test_setup_pip_deps(mock_popen, mock_path, tmpdir, plugin_manager):
                 "otherpkg",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "install", f"--python={py_loc}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -265,6 +269,7 @@ def test_setup_pip_deps_error(mock_popen, mock_path, tmpdir, plugin_manager):
                 "otherpkg",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
diff --git a/tests/test_interface_cfg.py b/tests/test_interface_cfg.py
index bb9bf90..c1e1482 100644
--- a/tests/test_interface_cfg.py
+++ b/tests/test_interface_cfg.py
@@ -150,16 +150,19 @@ def test_cli_basic(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "myupgrade", "--upgrade"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "list", f"--python={py_loc!s}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -211,11 +214,13 @@ def test_cli_basic_lower(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "mylower==0.0.1"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -274,6 +279,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_myupgrade_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -286,11 +292,13 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "install", f"--python={py_allreq_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -303,6 +311,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -315,6 +324,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "json",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -327,6 +337,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "json",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -425,6 +436,7 @@ def test_cli_nosetup(mock_popen, mock_cpopen):
         call(
             ("uv", "pip", "list", f"--python={py_loc}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -506,6 +518,7 @@ def test_cli_notest(mock_popen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -518,11 +531,13 @@ def test_cli_notest(mock_popen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "list", f"--python={py_loc!s}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -558,6 +573,7 @@ def test_cli_notest_lower(mock_popen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -569,6 +585,7 @@ def test_cli_notest_lower(mock_popen, mock_builder):
                 "mylower==0.0.1",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
diff --git a/tests/test_interface_toml.py b/tests/test_interface_toml.py
index acaf0a6..afb26f3 100644
--- a/tests/test_interface_toml.py
+++ b/tests/test_interface_toml.py
@@ -142,6 +142,7 @@ def test_cli_basic(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -154,11 +155,13 @@ def test_cli_basic(mock_popen, mock_cpopen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "list", f"--python={py_loc!s}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -210,6 +213,7 @@ def test_cli_basic_lower(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -221,6 +225,7 @@ def test_cli_basic_lower(mock_popen, mock_cpopen, mock_builder):
                 "mylower==0.0.1",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -279,6 +284,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_myupgrade_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -291,6 +297,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -302,6 +309,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 ".",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -314,6 +322,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -326,6 +335,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "json",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -338,6 +348,7 @@ def test_cli_reqs(mock_popen, mock_cpopen, mock_builder):
                 "json",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -436,6 +447,7 @@ def test_cli_nosetup(mock_popen, mock_cpopen):
         call(
             ("uv", "pip", "list", f"--python={py_loc}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -517,6 +529,7 @@ def test_cli_notest(mock_popen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -529,11 +542,13 @@ def test_cli_notest(mock_popen, mock_builder):
                 "--upgrade",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
             ("uv", "pip", "list", f"--python={py_loc!s}", "--format", "json"),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]
@@ -569,6 +584,7 @@ def test_cli_notest_lower(mock_popen, mock_builder):
         call(
             ("uv", "pip", "install", f"--python={py_loc!s}", "."),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
         call(
@@ -580,6 +596,7 @@ def test_cli_notest_lower(mock_popen, mock_builder):
                 "mylower==0.0.1",
             ),
             stdout=-1,
+            stderr=-1,
             universal_newlines=True,
         ),
     ]