diff --git a/tests/data/esbo-etc_defaults.xml b/tests/data/esbo-etc_defaults.xml
new file mode 100644
index 0000000..6f7c55b
--- /dev/null
+++ b/tests/data/esbo-etc_defaults.xml
@@ -0,0 +1,55 @@
+<root>
+    <common>
+        <wl_min val="400" units="nanometer" comment="Shortest wavelength used for binning input spectra"/>
+        <wl_max val="5" units="micron" comment="Shortest wavelength used for binning input spectra"/>
+        <wl_delta val="10" units="nanometer" comment="Wavelength increment used for binning input spectra"/>
+<!--        <res val="1000" units=""-->
+<!--                   comment="Resolving power for common spectral binning. A linear binning wavelength integral is estimated as wl_min/R"/>-->
+        <d_aperture val="5" units="m" comment="Diameter of the telescope aperture"/>
+        <jitter_rms val="0.1" units="arcsec" comment="Sigma RMS of the telescope jitter"/>
+        <output_path val="output" comment="Output directory to store output files"/>
+    </common>
+
+    <noise>
+        <EnableJitter val="False"/>
+        <EnableShotNoise val="True"/>
+        <EnableReadoutNoise val="True"/>
+    </noise>
+
+    <astroscene>
+        <target type="BlackBodyTarget" val="5778" units="K" mag="10" band="G"
+                comment="Modeling the sun as mag 10 star"/>
+        <optical_component type="Atmosphere" transmissivity="data/atmosphere/transmittance.csv"
+                           emission="data/atmosphere/emission.csv" comment="Including the atmosphere"/>
+        <optical_component type="StrayLight" emission="data/strayLight/emission.csv"
+                           comment="Including arbitrary noise sources"/>
+    </astroscene>
+
+    <common_optics>
+        <optical_component type="Mirror" reflectivity="data/mirror/reflectivity.csv"
+                           emissivity="data/mirror/emissivity.csv" val="70" units="K" comment="M1"/>
+        <optical_component type="Mirror" reflectivity="data/mirror/reflectivity.csv"
+                           emissivity="data/mirror/emissivity.csv" val="70" units="K" comment="M2"/>
+        <optical_component type="Mirror" reflectivity="data/mirror/reflectivity.csv"
+                           emissivity="data/mirror/emissivity.csv" val="70" units="K" comment="M3"/>
+        <optical_component type="Filter" band="G"
+                           emissivity="data/filter/emissivity.csv" val="70" units="K" comment="Filter wheel"/>
+    </common_optics>
+
+    <instrument>
+        <optical_component type="Mirror" reflectivity="data/mirror/reflectivity.csv"
+                           emissivity="data/mirror/emissivity.csv" val="70" units="K" comment="M4"/>
+        <optical_component type="Filter" band="G"
+                           emissivity="data/filter/emissivity.csv" val="70" units="K" comment="Filter wheel"/>
+        <sensor type="CCD">
+            <f_number val="18.5" units="" comment="The working f/#"/>
+            <pixel_geometry val="1024, 1024" units="" comment="Pixel geometry"/>
+            <pixel>
+                <quantum_efficiency val="data/ccd/qe.csv" comment="Quantum efficiency of the detector pixel"/>
+                <pixel_size val="15" units="micron"/>
+                <dark_current val="20" units="1/s" comment="Detector dark current"/>
+                <sigma_read_out val="10.0" units="" comment="Detector readout noise in e-rms"/>
+            </pixel>
+        </sensor>
+    </instrument>
+</root>
diff --git a/tests/test_config.py b/tests/test_config.py
new file mode 100644
index 0000000..0a25452
--- /dev/null
+++ b/tests/test_config.py
@@ -0,0 +1,16 @@
+from unittest import TestCase
+from esbo_etc.classes.config import Configuration, Entry
+import astropy.units as u
+
+
+class TestConfiguration(TestCase):
+    def setUp(self):
+        self.config = Configuration("data/esbo-etc_defaults.xml")
+
+    def test_signal(self):
+        self.assertTrue(isinstance(self.config.conf, Entry))
+        self.assertTrue(
+            {"common", "noise", "astroscene", "common_optics", "instrument"}.issubset(self.config.conf.__dir__()))
+        self.assertTrue({"wl_min", "wl_max", "wl_delta", "d_aperture", "jitter_rms", "output_path",
+                         "wl_bins"}.issubset(self.config.conf.common.__dir__()))
+        self.assertTrue(self.config.conf.common.wl_min().unit.is_equivalent(u.meter))