diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ba452c5..bad296f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,7 +39,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9"]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
 
     steps:
@@ -61,12 +61,10 @@ jobs:
         python -m site
         python -m pip install --upgrade pip setuptools wheel
         pip install -r requirements.txt
-        pip install nose coveralls
+        pip install -r requirements-dev.txt
 
     - name: Run tests
-      run: |
-        python -m nose --with-coverage --cover-package markovify test
-        python -m coverage html
+      run: make tests
 
     - name: Upload code coverage
       uses: codecov/codecov-action@v1.0.12
diff --git a/Makefile b/Makefile
index 962b4f7..a76557b 100644
--- a/Makefile
+++ b/Makefile
@@ -4,13 +4,12 @@ venv:
 	python3 -m venv venv
 
 requirements:
-	. venv/bin/activate
 	pip install --upgrade pip
 	pip install -r requirements-dev.txt
 	pip install -e .
 
 tests:
-	python -m nose --with-coverage --cover-package markovify test
+	python -m pytest test
 	python -m coverage html
 
 check-black:
diff --git a/README.md b/README.md
index 171644a..600172d 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ Some reasons:
 
 - Relies only on pure-Python libraries, and very few of them.
 
-- Tested on Python 3.6, 3.7, 3.8, and 3.9.
+- Tested on Python 3.7, 3.8, 3.9, and 3.10.
 
 
 ## Installation
diff --git a/requirements-dev.txt b/requirements-dev.txt
index c1e6eaa..95c23a4 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,5 @@
 black
 flake8
-nose
+pytest
+pytest-cov
 coveralls
diff --git a/setup.cfg b/setup.cfg
index 8983a73..0d1f069 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,14 +2,10 @@
 # max-complexity = 10
 max-line-length = 88
 ignore = 
-    E203 # https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html?highlight=slices#slices
-    W503 # Impossible to obey both W503 and W504
+    # https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html?highlight=slices#slices
+    E203,
+    # Impossible to obey both W503 and W504
+    W503
 
-[tox]
-envlist = py36,py37,py38,py39
-toxworkdir={env:TOX_WORK_DIR:.tox}
-
-[testenv]
-deps=
-    -r requirements-dev.txt
-commands=nosetests --with-coverage --cover-package markovify test
+[tool:pytest]
+addopts=--cov=markovify --cov-report xml:coverage.xml --cov-report term
diff --git a/test/test_basic.py b/test/test_basic.py
index 5f43f15..506a483 100644
--- a/test/test_basic.py
+++ b/test/test_basic.py
@@ -142,7 +142,8 @@ def test_min_words(self):
 
     def test_newline_text(self):
         with open(
-            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt")
+            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt"),
+            encoding="utf-8",
         ) as f:
             model = markovify.NewlineText(f.read())
         model.make_sentence()
diff --git a/test/test_itertext.py b/test/test_itertext.py
index 8c85fd8..3284767 100644
--- a/test/test_itertext.py
+++ b/test/test_itertext.py
@@ -13,7 +13,8 @@ def test_simple(self):
 
     def test_without_retaining(self):
         with open(
-            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt")
+            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt"),
+            encoding="utf-8",
         ) as f:
             senate_model = markovify.Text(f, retain_original=False)
         sent = senate_model.make_sentence()
@@ -22,7 +23,8 @@ def test_without_retaining(self):
 
     def test_from_json_without_retaining(self):
         with open(
-            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt")
+            os.path.join(os.path.dirname(__file__), "texts/senate-bills.txt"),
+            encoding="utf-8",
         ) as f:
             original_model = markovify.Text(f, retain_original=False)
         d = original_model.to_json()
@@ -37,7 +39,10 @@ def test_from_mult_files_without_retaining(self):
             os.path.join(os.path.dirname(__file__), "texts")
         ):
             for filename in filenames:
-                with open(os.path.join(dirpath, filename)) as f:
+                with open(
+                    os.path.join(dirpath, filename),
+                    encoding="utf-8",
+                ) as f:
                     models.append(markovify.Text(f, retain_original=False))
         combined_model = markovify.combine(models)
         sent = combined_model.make_sentence()