diff --git a/tests/test_build_system.py b/tests/test_build_system.py
new file mode 100644
index 0000000..1f8d98d
--- /dev/null
+++ b/tests/test_build_system.py
@@ -0,0 +1,44 @@
+# kas - setup tool for bitbake based projects
+#
+# Copyright (c) Siemens AG, 2020
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import os
+import shutil
+from kas import kas
+
+
+def test_build_system(changedir, tmpdir):
+    tdir = str(tmpdir.mkdir('test_build_system'))
+    shutil.rmtree(tdir, ignore_errors=True)
+    shutil.copytree('tests/test_build_system', tdir)
+    os.chdir(tdir)
+
+    kas.kas(['shell', 'test-oe.yml', '-c', 'true'])
+    with open('build-env', 'r') as f:
+        assert(f.readline().strip() == 'openembedded')
+
+    kas.kas(['shell', 'test-isar.yml', '-c', 'true'])
+    with open('build-env', 'r') as f:
+        assert(f.readline().strip() == 'isar')
+
+    kas.kas(['shell', 'test-openembedded.yml', '-c', 'true'])
+    with open('build-env', 'r') as f:
+        assert(f.readline().strip() == 'openembedded')
diff --git a/tests/test_build_system/isar-init-build-env b/tests/test_build_system/isar-init-build-env
new file mode 100755
index 0000000..b7c874e
--- /dev/null
+++ b/tests/test_build_system/isar-init-build-env
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "isar" > build-env
diff --git a/tests/test_build_system/oe-init-build-env b/tests/test_build_system/oe-init-build-env
new file mode 100755
index 0000000..8458b4a
--- /dev/null
+++ b/tests/test_build_system/oe-init-build-env
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "openembedded" > build-env
diff --git a/tests/test_build_system/test-isar.yml b/tests/test_build_system/test-isar.yml
new file mode 100644
index 0000000..c1ad97f
--- /dev/null
+++ b/tests/test_build_system/test-isar.yml
@@ -0,0 +1,7 @@
+header:
+  version: 10
+
+build_system: isar
+
+repos:
+  this:
diff --git a/tests/test_build_system/test-oe.yml b/tests/test_build_system/test-oe.yml
new file mode 100644
index 0000000..b20097e
--- /dev/null
+++ b/tests/test_build_system/test-oe.yml
@@ -0,0 +1,7 @@
+header:
+  version: 10
+
+build_system: oe
+
+repos:
+  this:
diff --git a/tests/test_build_system/test-openembedded.yml b/tests/test_build_system/test-openembedded.yml
new file mode 100644
index 0000000..646ec8e
--- /dev/null
+++ b/tests/test_build_system/test-openembedded.yml
@@ -0,0 +1,7 @@
+header:
+  version: 10
+
+build_system: openembedded
+
+repos:
+  this: