diff --git a/pyproject.toml b/pyproject.toml
index 7a17ae4..60dc883 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@
 # along with this program. If not, see https://www.gnu.org/licenses/.
 
 [project]
-name = "manchot-plot"
+name = "manchot_plot"
 version = "0.0.1"
 authors = [
   { name="Moussouni, Yaël", email="yael.moussouni@astro.unistra.fr" },
diff --git a/src/manchot-plot/__init__.py b/src/manchot_plot/__init__.py
similarity index 97%
rename from src/manchot-plot/__init__.py
rename to src/manchot_plot/__init__.py
index b779461..e784126 100644
--- a/src/manchot-plot/__init__.py
+++ b/src/manchot_plot/__init__.py
@@ -29,4 +29,4 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see www.gnu.org/licenses/.
 """
 
-from manchot_plot import *
+from .manchot_plot import *
diff --git a/src/manchot-plot/manchot-plot.py b/src/manchot_plot/manchot_plot.py
similarity index 97%
rename from src/manchot-plot/manchot-plot.py
rename to src/manchot_plot/manchot_plot.py
index a72f810..7d63dc6 100644
--- a/src/manchot-plot/manchot-plot.py
+++ b/src/manchot_plot/manchot_plot.py
@@ -29,4 +29,5 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see www.gnu.org/licenses/.
 """
 
-a = 0
+def ping():
+    return "pong"
diff --git a/tests/test.py b/tests/test.py
index 215e0ad..4b04a2b 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -1,3 +1,3 @@
-import manchot
+import manchot_plot
 
-print(manchot.a)
+print(manchot_plot.a)