diff --git a/.github/workflows/commit.yml b/.github/workflows/commit.yml
index 85751cf635..cbf1e3e5e9 100644
--- a/.github/workflows/commit.yml
+++ b/.github/workflows/commit.yml
@@ -4,7 +4,6 @@ on:
     branches:
       - master
       - develop
-      - release*
       - ci-diagnose*
   pull_request:
     branches:
diff --git a/autotest/generate_classes.py b/autotest/generate_classes.py
deleted file mode 100644
index eb46c97097..0000000000
--- a/autotest/generate_classes.py
+++ /dev/null
@@ -1,29 +0,0 @@
-import os
-
-import pytest
-from autotest.conftest import get_project_root_path
-from modflow_devtools.markers import excludes_branch
-
-from flopy.mf6.utils import generate_classes
-
-_project_root_path = get_project_root_path()
-_using_xdist = bool(os.environ.get("PYTEST_XDIST_WORKER", None))
-
-
-@excludes_branch("master")
-@pytest.mark.mf6
-@pytest.mark.skipif(
-    _using_xdist,
-    reason="modifies and reverts repository files, can't be run in parallel",
-)
-def test_generate_classes_from_dfn():
-    try:
-        generate_classes(branch="develop", backup=False)
-    finally:
-        paths = [
-            _project_root_path / "flopy" / "mf6" / "data" / "dfn",
-            _project_root_path / "flopy" / "mf6" / "modflow",
-        ]
-        # restoring might lose work if these files have been modified
-        for path in paths:
-            os.system(f"git restore {path}")
diff --git a/autotest/test_binaryfile.py b/autotest/test_binaryfile.py
index 47c59603d6..68c305e7ad 100644
--- a/autotest/test_binaryfile.py
+++ b/autotest/test_binaryfile.py
@@ -1,3 +1,5 @@
+from pprint import pprint
+
 import numpy as np
 import pytest
 from autotest.conftest import get_example_data_path
@@ -13,7 +15,12 @@
     HeadUFile,
     Util2d,
 )
-from flopy.utils.binaryfile import get_headfile_precision
+from flopy.utils.binaryfile import (
+    get_headfile_precision,
+    write_budget,
+    write_head,
+)
+from flopy.utils.gridutil import uniform_flow_field
 
 
 @pytest.fixture
@@ -241,11 +248,38 @@ def test_budgetfile_detect_precision_double(path):
     assert file.realtype == np.float64
 
 
-@pytest.mark.skip(reason="todo")
-def test_write_head():
-    pass
+def test_write_head(function_tmpdir):
+    file_path = function_tmpdir / "headfile"
+    head_data = np.random.random((10, 10))
+
+    write_head(file_path, head_data)
+
+    assert file_path.is_file()
+    content = np.fromfile(file_path)
+    assert np.array_equal(head_data.ravel(), content)
+
+    # TODO: what else needs to be checked here?
+
+
+def test_write_budget(function_tmpdir):
+    file_path = function_tmpdir / "budgetfile"
+
+    nlay = 3
+    nrow = 3
+    ncol = 3
+    qx = 1.0
+    qy = 0.0
+    qz = 0.0
+    shape = (nlay, nrow, ncol)
+    spdis, flowja = uniform_flow_field(qx, qy, qz, shape)
+
+    write_budget(file_path, flowja, kstp=0)
+    assert file_path.is_file()
+    content1 = np.fromfile(file_path)
 
+    write_budget(file_path, flowja, kstp=1, kper=1, text="text")
+    assert file_path.is_file()
+    content2 = np.fromfile(file_path)
 
-@pytest.mark.skip(reason="todo")
-def test_write_budget():
-    pass
+    # TODO: why are these the same?
+    assert np.array_equal(content1, content2)