diff --git a/example/modelchain_example.ipynb b/example/modelchain_example.ipynb
index f4b1f748..1b4dfa9e 100644
--- a/example/modelchain_example.ipynb
+++ b/example/modelchain_example.ipynb
@@ -288,7 +288,7 @@
    "source": [
     "# specification of wind turbine where power coefficient curve and nominal\n",
     "# power is provided in an own csv file\n",
-    "csv_path = 'data'\n",
+    "csv_path = ''\n",
     "dummy_turbine = {\n",
     "    'turbine_type': 'DUMMY 1',  # turbine type as in file\n",
     "    'hub_height': 100,  # in m\n",
diff --git a/example/modelchain_example.py b/example/modelchain_example.py
index 7a73a222..b1d68c7b 100644
--- a/example/modelchain_example.py
+++ b/example/modelchain_example.py
@@ -144,12 +144,11 @@ def initialize_wind_turbines():
 
     # ************************************************************************
     # **** Specification of wind turbine with data in own file ***************
-    csv_path = os.path.join(os.path.dirname(__file__), "data")
     dummy_turbine = {
         "turbine_type": "DUMMY 1",
         "hub_height": 100,  # in m
         "rotor_diameter": 70,  # in m
-        "path": csv_path,
+        "path": os.path.dirname(__file__),
     }
     dummy_turbine = WindTurbine(**dummy_turbine)
 
diff --git a/example/data/power_coefficient_curves.csv b/example/power_coefficient_curves.csv
similarity index 100%
rename from example/data/power_coefficient_curves.csv
rename to example/power_coefficient_curves.csv
diff --git a/example/data/power_curves.csv b/example/power_curves.csv
similarity index 100%
rename from example/data/power_curves.csv
rename to example/power_curves.csv
diff --git a/example/data/turbine_data.csv b/example/turbine_data.csv
similarity index 100%
rename from example/data/turbine_data.csv
rename to example/turbine_data.csv
diff --git a/tests/data/power_coefficient_curves.csv b/tests/data/power_coefficient_curves.csv
new file mode 100755
index 00000000..a3c70cc1
--- /dev/null
+++ b/tests/data/power_coefficient_curves.csv
@@ -0,0 +1,3 @@
+turbine_type,0,0.5,1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,11.5,12,12.5,13,13.5,14,14.5,15,15.5,16,16.5,17,17.5,18,18.5,19,19.5,20,20.5,21,21.5,22,22.5,23,23.5,24,24.5,25,25.5,26
+DUMMY 1,0,,0,,0,,0,0,0.13,,0.38,,0.46,,0.48,,0.47,,0.44,,0.4,,0.36,,0.31,,0.26,,0.23,,0.2,,0.18,,0.14,,0.11,,0.1,,0.09,,0.07,,0.05,,0.04,,0.04,,0.03,,0
+DUMMY 2,0,,0,,0,,0.16,0.29,0.35,0.38,0.4,0.41,0.42,0.43,0.43,0.44,0.44,0.44,0.44,0.43,0.42,0.39,0.36,0.32,0.29,0.26,0.23,0.2,0.18,0.16,0.15,0.14,0.12,0.11,0.1,0.09,0.09,0.08,0.07,0.07,0.06,0.06,0.05,0.05,0.05,0.04,0.04,0.04,0.04,0.03,0.03,0,0
diff --git a/tests/data/power_curves.csv b/tests/data/power_curves.csv
new file mode 100755
index 00000000..85890d50
--- /dev/null
+++ b/tests/data/power_curves.csv
@@ -0,0 +1,3 @@
+turbine_type,0,0.5,1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,11.5,12,12.5,13,13.5,14,14.5,15,15.5,16,16.5,17,17.5,18,18.5,19,19.5,20,20.5,21,21.5,22,22.5,23,23.5,24,24.5,25,25.5,26
+DUMMY 3,0,0,0,0,0,0,0,18000,34000,70000,10000,150000,190000,260000,330000,420000,510000,620000,740000,880000,1020000,1180000,1330000,1420000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,1500000,0,
+DUMMY 4,0,,0,,0,,0,,4000,,22000,,46000,,76000,,111000,,147000,,184000,,219000,,249000,,274000,,290000,,297000,,302000,,307000,,307000,,305000,,295000,,280000,,260000,,240000,,230000,,225000,0,
diff --git a/tests/data/turbine_data.csv b/tests/data/turbine_data.csv
new file mode 100644
index 00000000..0e9b9f9f
--- /dev/null
+++ b/tests/data/turbine_data.csv
@@ -0,0 +1,5 @@
+turbine_type,nominal_power
+DUMMY 1,4200000
+DUMMY 2,4200000
+DUMMY 3,1500000
+DUMMY 4,225000
diff --git a/tests/test_wind_turbine.py b/tests/test_wind_turbine.py
index 4140911f..fb23f084 100644
--- a/tests/test_wind_turbine.py
+++ b/tests/test_wind_turbine.py
@@ -22,7 +22,7 @@ class TestWindTurbine:
     @classmethod
     def setup_class(cls):
         """Setup default values"""
-        cls.source = os.path.join(os.path.dirname(__file__), "../example/data")
+        cls.source = os.path.join(os.path.dirname(__file__), "data")
 
     def test_warning(self, recwarn):
         test_turbine_data = {
diff --git a/windpowerlib/wind_turbine.py b/windpowerlib/wind_turbine.py
index 6ab1c52a..0b4fb2fb 100644
--- a/windpowerlib/wind_turbine.py
+++ b/windpowerlib/wind_turbine.py
@@ -101,7 +101,7 @@ class WindTurbine(object):
     >>> print(e126.nominal_power)
     4200000.0
     >>> # Example with own path
-    >>> path=os.path.join(os.path.dirname(__file__), '../example/data')
+    >>> path=os.path.join(os.path.dirname(__file__), '../tests/data')
     >>> example_turbine={
     ...    'hub_height': 100,
     ...    'rotor_diameter': 70,
@@ -378,7 +378,7 @@ def get_turbine_data_from_file(turbine_type, path):
     --------
     >>> from windpowerlib import wind_turbine
     >>> import os
-    >>> path=os.path.join(os.path.dirname(__file__), '../example/data',
+    >>> path=os.path.join(os.path.dirname(__file__), '../tests/data',
     ...     'power_curves.csv')
     >>> d3=get_turbine_data_from_file('DUMMY 3', path)
     >>> print(d3['value'][7])