diff --git a/.gitignore b/.gitignore
index 41f5d7c..51933a9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /temp/
 /src/__pycache__/
 /test-param-jsons/
-/__pycache__
\ No newline at end of file
+/__pycache__/
+/.pytest_cache/
\ No newline at end of file
diff --git a/invalid-example.json b/invalid-example.json
new file mode 100644
index 0000000..901f53c
--- /dev/null
+++ b/invalid-example.json
@@ -0,0 +1,137 @@
+{
+    "cabinet": {
+        "container_type": "singularity",
+        "stages": ["bibsnet", "solve_world_hunger", "nibabies"],
+        "verbose": true,
+        "handle_missing_host_paths": "make_directories"
+    },
+
+    "stages": {
+        "bibsnet": {
+            "container_filepath": "/home/faird/shared/code/internal/pipelines/cabinet_container/cabinet_v2.4.3.sif",
+            "container_args": {
+                "--cleanenv": true,
+                "--nv": true
+            },
+            "binds": [
+                {
+                    "host_path":"/home/faird/shared/data/BCP-MVP_BIBSNet/input/",
+                    "container_path":"/input"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/derivatives/"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/work/",
+                    "container_path":"/work"
+                }
+            ],
+            "positional_args": [
+                "/input", "/output", "participant"
+            ],
+            "flags": {
+                "--parameter-json":"/home/cabinet/parameter-file-container.json",
+                "-start":"prebibsnet",
+                "-end":"postbibsnet",
+                "-v": true,
+                "--participant-label":"470437",
+                "-w":"/work"
+            }
+        },
+        "nibabies": {  
+            "container_filepath": "/home/faird/shared/code/external/pipelines/nibabies/nibabies_t1-t2-derivatives_08102023.sif",
+            "container_args": {
+                "--cleanenv": true
+            },
+            "binds": [
+                {
+                    "host_path":"/home/faird/shared/data/BCP-MVP_BIBSNet/input/",
+                    "container_path":"/bids_dir"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/derivatives/nibabies/",
+                    "container_path":"/output_dir"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/work/",
+                    "container_path":"/work"
+                },
+                {
+                    "host_path":"/home/faird/shared/code/external/utilities/freesurfer_license/license.txt",
+                    "container_path":"/opt/freesurfer/license.txt"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/derivatives/bibsnet/",
+                    "container_path":"/derivatives"
+                },
+                {
+                    "host_path":"/home/faird/tikal004/fake/file/path/",
+                    "container_path":"/fake_path"
+                }
+            ],
+            "positional_args": [
+                "/bids_dir", "/output_dir", "participant"
+            ],
+            "flags": {
+                "--project-goodvoxels": true,
+                "--surface-recon-method": "mcribs",
+                "--omp-nthreads": 3,
+                "--resource-monitor": true,
+                "--cifti-output": "91k",
+                "-vv": true,
+                "-w": "/work", 
+                "--fd-radius": 35,
+                "--derivatives": "/derivatives",
+                "--age-months": 1,
+                "--participant-label":"470437"
+            }
+        },
+        "xcpd": {
+            "container_args": {
+                "--cleanenv": true
+            },
+            "binds": [
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/work/",
+                    "container_path":"/work"
+                },
+                {
+                    "host_path":"/home/faird/shared/code/external/utilities/freesurfer_license/license.txt",
+                    "container_path":"/opt/freesurfer/license.txt"
+                },
+                {
+                    "host_path":"/home/feczk001/shared/projects/segpipeline_testing/Barry_test/cbaw-test/derivatives/",
+                    "container_path":"/output_dir"
+                },
+                {
+                    "host_path":"/home/faird/shared/code/external/pipelines/xcp_d_test_binds/20230712_fix-collection/xcp_d/xcp_d",
+                    "container_path":"/usr/local/miniconda/lib/python3.8/site-packages/xcp_d"
+                }
+            ],
+            "positional_args": [
+                "/output_dir/nibabies", "/output_dir/", "participant"
+            ],
+            "flags": {
+                "--input-type": "nibabies",
+                "--cifti": true,
+                "--despike":true,
+                "--resource-monitor": true,
+                "--dcan-qc": true,
+                "-w": "/work",
+                "--omp-nthreads": 3,
+                "--warp-surfaces-native2std": true,
+                "-f": 0.3,
+                "-m": true,
+                "-vv": true,
+                "--participant-label": "470437" 
+            }
+        },
+        "lolcow": {
+            "container_filepath": "/home/faird/tikal004/lolcow.sif",
+            "action": "exe",
+            "positional_args": [
+                "cowsay", "\"Thank you for testing CABINET\""
+            ]
+        }
+    }
+}
diff --git a/lolcow_test.json b/lolcow_test.json
new file mode 100644
index 0000000..bab8361
--- /dev/null
+++ b/lolcow_test.json
@@ -0,0 +1,22 @@
+{
+    "cabinet": {
+        "container_type": "singularity",
+        "stages": ["lolcow", "dockerfail", "lolcow", "lolcow-exec"]
+    },
+
+    "stages": {
+        "lolcow": {
+            "container_filepath": "/home/faird/shared/code/internal/utilities/test_containers/lolcow.sif"
+        },
+        "dockerfail": {
+            "container_filepath": "/home/faird/shared/code/internal/utilities/test_containers/dockerfail.sif"
+        },
+        "lolcow-exec": {
+            "action": "exec",
+            "container_filepath": "/home/faird/shared/code/internal/utilities/test_containers/lolcow.sif",
+            "positional_args": [
+                "cowsay", "Thank you for testing CABINET"
+            ]
+        }
+    }
+}
diff --git a/lolcow_test.py b/lolcow_test.py
new file mode 100755
index 0000000..b942e92
--- /dev/null
+++ b/lolcow_test.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+# coding: utf-8
+
+from src.valid_jargs_class import ValidJargs
+from src.wrapper_class import Wrapper
+
+param_json = "lolcow_test.json"
+
+Jargs = ValidJargs(param_json)
+
+Test = Wrapper(Jargs)
+
+def test_run_stage_pass():
+
+    assert Test.run_stage("lolcow")
+
+def test_run_stage_fail():
+    
+    assert not Test.run_stage("dockerfail")
diff --git a/param_test.py b/param_test.py
new file mode 100644
index 0000000..4c1220c
--- /dev/null
+++ b/param_test.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+# coding: utf-8
+
+from src.valid_jargs_class import ValidJargs
+
+param_json = "invalid-example.json"
+
+Jargs = ValidJargs(param_json)
+
+assert not Jargs.validate_cabinet_options()
\ No newline at end of file