diff --git a/btest.cfg b/btest.cfg
deleted file mode 100644
index 7d0611e..0000000
--- a/btest.cfg
+++ /dev/null
@@ -1,9 +0,0 @@
-[btest]
-TestDirs    = pysubnettree
-TmpDir      = %(testbase)s/.tmp
-BaselineDir = %(testbase)s/Baseline
-IgnoreDirs  = .svn CVS .tmp
-IgnoreFiles = *.tmp *.swp #* *.trace .DS_Store
-
-[environment]
-TMPDIR=%(testbase)s/.tmp
diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..78cc5ff
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,36 @@
+import subprocess
+import sys
+import pytest
+
+
+def pytest_collect_file(parent, file_path):
+    if file_path.suffix == ".test":
+        return BtestFile.from_parent(parent, path=file_path)
+
+
+class BtestFile(pytest.File):
+    def collect(self):
+        yield BtestItem.from_parent(self, name=self.path.stem)
+
+
+class BtestItem(pytest.Item):
+    def runtest(self):
+        result = subprocess.run(
+            [sys.executable, str(self.parent.path)],
+            capture_output=True,
+            text=True,
+        )
+        if result.returncode != 0:
+            raise BtestFailure(result)
+
+    def repr_failure(self, excinfo):
+        exc = excinfo.value
+        return (exc.result.stdout + exc.result.stderr).strip()
+
+    def reportinfo(self):
+        return self.parent.path, None, f"btest: {self.name}"
+
+
+class BtestFailure(Exception):
+    def __init__(self, result):
+        self.result = result
diff --git a/python-pysubnettree.spec b/python-pysubnettree.spec
index 2e6c752..f752ee7 100644
--- a/python-pysubnettree.spec
+++ b/python-pysubnettree.spec
@@ -7,15 +7,15 @@ Summary:        Python Module for CIDR Lookups
 License:        BSD-3-Clause-LBNL and BSD-4-Clause
 URL:            https://github.com/zeek/pysubnettree
 Source0:        %{url}/archive/v%{version}/%{name}-%{version}.tar.gz
-# btest config file for RPM build environment
-Source1:        btest.cfg
+# pytest plugin to collect and run *.test files without btest
+Source1:        conftest.py
 
 Provides:       pysubnettree = %{version}-%{release}
 Obsoletes:      pysubnettree < 0.35-16
 
 BuildRequires:  python3-devel
 BuildRequires:  gcc-c++
-BuildRequires:  zeek-btest
+BuildRequires:  python3-pytest
 
 
 %global _description %{expand:
@@ -52,9 +52,9 @@ Summary:        %{summary}
 
 %check
 %pyproject_check_import
+cp %{SOURCE1} testing/conftest.py
 cd testing
-cp %{SOURCE1} btest.cfg
-PYTHONPATH="%{buildroot}%{python3_sitearch}:$PWD/Scripts" btest -c btest.cfg -d
+PYTHONPATH="%{buildroot}%{python3_sitearch}:$PWD/Scripts" pytest pysubnettree/
 
 
 %files -n python3-pysubnettree -f %{pyproject_files}