diff --git a/lib/python/picongpu/plugins/__init__.py b/lib/python/picongpu/plugins/__init__.py
index e69de29bb2..5480e800a7 100644
--- a/lib/python/picongpu/plugins/__init__.py
+++ b/lib/python/picongpu/plugins/__init__.py
@@ -0,0 +1,8 @@
+from .energy_histogram import EnergyHistogram
+from .phase_space import PhaseSpace
+from .png import PNG
+
+
+__all__ = ["EnergyHistogram",
+           "PhaseSpace",
+           "PNG"]
diff --git a/lib/python/picongpu/plugins/plot_mpl/__init__.py b/lib/python/picongpu/plugins/plot_mpl/__init__.py
index e69de29bb2..03102ed2dd 100644
--- a/lib/python/picongpu/plugins/plot_mpl/__init__.py
+++ b/lib/python/picongpu/plugins/plot_mpl/__init__.py
@@ -0,0 +1,9 @@
+from .energy_histogram_visualizer import Visualizer as \
+    EnergyHistogramMPL
+from .phase_space_visualizer import Visualizer as PhaseSpaceMPL
+from .png_visualizer import Visualizer as PNGMPL
+
+
+__all__ = ["EnergyHistogramMPL",
+           "PhaseSpaceMPL",
+           "PNGMPL"]