diff --git a/Pipfile b/Pipfile
index 630f4ec..85ad666 100644
--- a/Pipfile
+++ b/Pipfile
@@ -4,9 +4,10 @@ url = "https://pypi.org/simple"
 verify_ssl = true
 
 [dev-packages]
-nose = "*"
 coverage = "*"
 twine = "*"
+pytest = "*"
+pytest-cov = "*"
 
 [packages]
 urllib3 = ">=2.1.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index ac5ba73..d1ab4bd 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "2ab50499e986c80ada85e1893167602499fae6cd6d46d2c25ac232c34cb22092"
+            "sha256": "09dfd0a28da4402be6db03781432fb082e5fe5d6010dae3f98443aa5d336f526"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -433,6 +433,9 @@
             "version": "==3.3.2"
         },
         "coverage": {
+            "extras": [
+                "toml"
+            ],
             "hashes": [
                 "sha256:04387a4a6ecb330c1878907ce0dc04078ea72a869263e53c72a1ba5bbdf380ca",
                 "sha256:0676cd0ba581e514b7f726495ea75aba3eb20899d824636c6f59b0ed2f88c471",
@@ -515,6 +518,14 @@
             "markers": "python_version >= '3.8'",
             "version": "==7.0.1"
         },
+        "iniconfig": {
+            "hashes": [
+                "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3",
+                "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.0.0"
+        },
         "jaraco.classes": {
             "hashes": [
                 "sha256:10afa92b6743f25c0cf5f37c6bb6e18e2c5bb84a16527ccfc0040ea377e7aaeb",
@@ -576,14 +587,13 @@
             ],
             "version": "==0.2.15"
         },
-        "nose": {
+        "packaging": {
             "hashes": [
-                "sha256:9ff7c6cc443f8c51994b34a667bbcf45afd6d945be7477b52e97516fd17c53ac",
-                "sha256:dadcddc0aefbf99eea214e0f1232b94f2fa9bd98fa8353711dacb112bfcbbb2a",
-                "sha256:f1bffef9cbc82628f6e7d7b40d7e255aefaa1adb6a1b1d26c69a8b79e6208a98"
+                "sha256:048fb0e9405036518eaaf48a55953c750c11e1a1b68e0dd1a9d62ed0c092cfc5",
+                "sha256:8c491190033a9af7e1d931d0b5dacc2ef47509b34dd0de67ed209b5203fc88c7"
             ],
-            "index": "pypi",
-            "version": "==1.3.7"
+            "markers": "python_version >= '3.7'",
+            "version": "==23.2"
         },
         "pkginfo": {
             "hashes": [
@@ -593,6 +603,14 @@
             "markers": "python_version >= '3.6'",
             "version": "==1.9.6"
         },
+        "pluggy": {
+            "hashes": [
+                "sha256:cf61ae8f126ac6f7c451172cf30e3e43d3ca77615509771b3a984a0730651e12",
+                "sha256:d89c696a773f8bd377d18e5ecda92b7a3793cbe66c87060a6fb58c7b6e1061f7"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==1.3.0"
+        },
         "pygments": {
             "hashes": [
                 "sha256:b27c2826c47d0f3219f29554824c30c5e8945175d888647acd804ddd04af846c",
@@ -601,6 +619,24 @@
             "markers": "python_version >= '3.7'",
             "version": "==2.17.2"
         },
+        "pytest": {
+            "hashes": [
+                "sha256:2cf0005922c6ace4a3e2ec8b4080eb0d9753fdc93107415332f50ce9e7994280",
+                "sha256:b090cdf5ed60bf4c45261be03239c2c1c22df034fbffe691abe93cd80cea01d8"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.7'",
+            "version": "==7.4.4"
+        },
+        "pytest-cov": {
+            "hashes": [
+                "sha256:3904b13dfbfec47f003b8e77fd5b589cd11904a21ddf1ab38a64f204d6a10ef6",
+                "sha256:6ba70b9e97e69fcc3fb45bfeab2d0a138fb65c4d0d6a41ef33983ad114be8c3a"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.7'",
+            "version": "==4.1.0"
+        },
         "readme-renderer": {
             "hashes": [
                 "sha256:13d039515c1f24de668e2c93f2e877b9dbe6c6c32328b90a40a49d8b2b85f36d",
diff --git a/contributing.md b/contributing.md
index ae676b0..d2b2641 100644
--- a/contributing.md
+++ b/contributing.md
@@ -1,10 +1,10 @@
 # Contributing
 
-I am accepting pull requests. Sometimes life gets busy and it takes me a little while to get everything merged in. To help speed up the process, please write tests to cover your changes. I will review/merge them as soon as possible. 
+I am accepting pull requests. Sometimes life gets busy and it takes me a little while to get everything reviewed and merged in. To help speed up the process, please write tests to cover your changes. I will review/merge them as soon as possible. 
 
 # Testing
 
-I use [nose](https://nose.readthedocs.io/en/latest/index.html) and [Coverage](https://coverage.readthedocs.io/en/latest/) to run the test suite.   
+I use [pytest](https://docs.pytest.org/en/7.4.x/contents.html), [Coverage](https://coverage.readthedocs.io/en/latest/), and [pytest-cov](https://pytest-cov.readthedocs.io/en/latest/) to run the test suite.
 
 *WARNING*: The Tests connect to the QBO API and create/modify/delete data. DO NOT USE A PRODUCTION ACCOUNT!
 
@@ -12,21 +12,24 @@ I use [nose](https://nose.readthedocs.io/en/latest/index.html) and [Coverage](ht
 
 1. Create/login into your [Intuit Developer account](https://developer.intuit.com).
 2. On your Intuit Developer account, create a Sandbox company and an App. 
-3. Go to the Intuit Developer OAuth 2.0 Playground and fill out the form to get an **access token** and **refresh token**. You will need to copy the following values into your enviroment variables:
+3. Go to the Intuit Developer OAuth 2.0 Playground and fill out the form to get a **refresh token**. You will need to copy the following values into your enviroment variables:
   ```
   export CLIENT_ID="<Client ID>"
   export CLIENT_SECRET="<Client Secret>" 
-  export COMPANY_ID="<Realm ID>"
-  export ACCESS_TOKEN="<Access token>"
+  export COMPANY_ID="<Realm ID>"  
   export REFRESH_TOKEN="<Refresh token>"
   ```
   
-  *Note*: You will need to update the access token when it expires. 
+  *Note*: You will need to update the refresh token when it expires. 
 
-5. Install *nose* and *coverage*. Using Pip:
-  `pip install nose coverage`
+5. Install *pytest*, *coverage*, and *pytest-cov*. Using Pip (or whatever):
+  `pip install pytest coverage pytest-cov`
   
-6. Run `nosetests . --with-coverage --cover-package=quickbooks`
+6. Run all tests: ```pytest  --cov```  
+   Run only unit tests: ```pytest tests/unit --cov```   
+   Run only integration tests: ```pytest tests/intergration --cov``` 
+
+
 
 ## Creating new tests
 Normal Unit tests that do not connect to the QBO API should be located under `test/unit` Test that connect to QBO API should go under `tests/integration`. Inheriting from `QuickbooksTestCase` will automatically setup `self.qb_client` to use when connecting to QBO.