diff --git a/CMakeLists.txt b/CMakeLists.txt
index 115189d1..2b4457e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,15 +45,30 @@ add_subdirectory(fortran/dmftproj)
 message(STATUS "TRIQS : Adding compilation flags detected by the library (C++11/14, libc++, etc...) ")
 
 add_subdirectory(c++)
-add_subdirectory(python)
+add_subdirectory(python python/triqs_dft_tools)
 add_subdirectory(shells)
 
 #------------------------
 # tests
 #------------------------
- 
+
+option(TEST_COVERAGE "Analyze the coverage of tests" OFF)
+
+# perform tests with coverage info
+if (${TEST_COVERAGE})
+  # we try to locate the coverage program
+  find_program(PYTHON_COVERAGE python-coverage)
+  find_program(PYTHON_COVERAGE coverage)
+  if(NOT PYTHON_COVERAGE)
+      message(FATAL_ERROR "Program coverage (or python-coverage) not found.\nEither set PYTHON_COVERAGE explicitly or disable TEST_COVERAGE!\nYou need to install the python package coverage, e.g. with\n  pip install coverage\nor with\n  apt install python-coverage")
+  endif()
+
+  message(STATUS "Setting up test coverage")
+  add_custom_target(coverage ${PYTHON_COVERAGE} combine --append .coverage plovasp/.coverage || true COMMAND ${PYTHON_COVERAGE} html COMMAND echo "Open ${CMAKE_BINARY_DIR}/test/htmlcov/index.html in browser!" WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/test)
+endif()
+
 enable_testing()
- 
+
 option(Build_Tests "Build the tests of the library " ON)
 if (Build_Tests)
   message(STATUS "-------- Preparing tests  -------------")
diff --git a/doc/conf.py.in b/doc/conf.py.in
index 482b845f..32f60a1e 100644
--- a/doc/conf.py.in
+++ b/doc/conf.py.in
@@ -4,6 +4,7 @@
 
 import sys
 sys.path.insert(0, "@TRIQS_SPHINXEXT_PATH@/numpydoc")
+sys.path.insert(0, "@CMAKE_BINARY_DIR@/python")
 
 extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.mathjax',
diff --git a/doc/install.rst b/doc/install.rst
index 0db1fc0e..36697638 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -123,3 +123,7 @@ Functionality of ``dft_tools`` can be tweaked using extra compile-time options p
 +---------------------------------------------------------------+-----------------------------------------------+
 | Build the documentation locally                               | -DBuild_Documentation=ON                      |
 +---------------------------------------------------------------+-----------------------------------------------+
+| Check test coverage when testing                              | -DTEST_COVERAGE=ON                            |
+| (run ``make coverage`` to show the results; requires the      |                                               |
+| python ``coverage`` package)                                  |                                               |
++---------------------------------------------------------------+-----------------------------------------------+
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index c5b33ea6..758ea139 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -7,8 +7,14 @@ FILE(COPY SrVO3.pmat SrVO3.struct SrVO3.outputs SrVO3.oubwin SrVO3.ctqmcout SrVO
 # List all tests
 set(all_tests wien2k_convert hk_convert w90_convert sumkdft_basic srvo3_Gloc srvo3_transp sigma_from_file blockstructure analyse_block_structure_from_gf analyse_block_structure_from_gf2)
 
+set(python_executable python)
+
+if(${TEST_COVERAGE})
+    set(python_executable ${PYTHON_COVERAGE} run --append --source "${CMAKE_BINARY_DIR}/python" )
+endif()
+
 foreach(t ${all_tests})
-  add_test(NAME ${t} COMMAND python ${CMAKE_CURRENT_SOURCE_DIR}/${t}.py)
+  add_test(NAME ${t} COMMAND ${python_executable} ${CMAKE_CURRENT_SOURCE_DIR}/${t}.py)
 endforeach()
 
 # Set the PythonPath : put the build dir first (in case there is an installed version). 
@@ -17,4 +23,3 @@ set_property(TEST ${all_tests} PROPERTY ENVIRONMENT PYTHONPATH=${CMAKE_BINARY_DI
 
 # VASP converter tests
 add_subdirectory(plovasp)
-
diff --git a/test/analyse_block_structure_from_gf.py b/test/analyse_block_structure_from_gf.py
index 35b699fb..5a831444 100644
--- a/test/analyse_block_structure_from_gf.py
+++ b/test/analyse_block_structure_from_gf.py
@@ -1,5 +1,5 @@
 from pytriqs.gf import *
-from sumk_dft import SumkDFT
+from triqs_dft_tools.sumk_dft import SumkDFT
 from scipy.linalg import expm
 import numpy as np
 from pytriqs.utility.comparison_tests import assert_gfs_are_close, assert_arrays_are_close, assert_block_gfs_are_close
diff --git a/test/analyse_block_structure_from_gf2.py b/test/analyse_block_structure_from_gf2.py
index 6ada6717..19553af8 100644
--- a/test/analyse_block_structure_from_gf2.py
+++ b/test/analyse_block_structure_from_gf2.py
@@ -1,5 +1,5 @@
 from pytriqs.gf import *
-from sumk_dft import SumkDFT
+from triqs_dft_tools.sumk_dft import SumkDFT
 import numpy as np
 from pytriqs.utility.comparison_tests import assert_block_gfs_are_close
 
diff --git a/test/blockstructure.py b/test/blockstructure.py
index ea2c7310..f7a68e5b 100644
--- a/test/blockstructure.py
+++ b/test/blockstructure.py
@@ -1,8 +1,8 @@
-from sumk_dft import *
+from triqs_dft_tools.sumk_dft import *
 from pytriqs.utility.h5diff import h5diff
 from pytriqs.gf import *
 from pytriqs.utility.comparison_tests import assert_block_gfs_are_close
-from block_structure import BlockStructure
+from triqs_dft_tools.block_structure import BlockStructure
 
 SK = SumkDFT('blockstructure.in.h5',use_dft_blocks=True)
 
diff --git a/test/hk_convert.py b/test/hk_convert.py
index e1d72893..f4c048c7 100644
--- a/test/hk_convert.py
+++ b/test/hk_convert.py
@@ -25,7 +25,7 @@ from pytriqs.archive import *
 from pytriqs.utility.h5diff import h5diff
 import pytriqs.utility.mpi as mpi
 
-from converters import *
+from triqs_dft_tools.converters import *
 
 Converter = HkConverter(filename='hk_convert_hamiltonian.hk',hdf_filename='hk_convert.out.h5')
 
diff --git a/test/plovasp/CMakeLists.txt b/test/plovasp/CMakeLists.txt
index 57e6877c..aa3f6a4e 100644
--- a/test/plovasp/CMakeLists.txt
+++ b/test/plovasp/CMakeLists.txt
@@ -12,7 +12,7 @@ FILE(COPY ${all_tests} DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
 FILE(COPY run_suite.py DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
 
 foreach(t ${all_tests})
-  add_test(NAME ${t} COMMAND python run_suite.py ${t})
+  add_test(NAME ${t} COMMAND ${python_executable} run_suite.py ${t})
 endforeach()
 
 set_property(TEST ${all_tests} PROPERTY ENVIRONMENT PYTHONPATH=${CMAKE_BINARY_DIR}/python:$ENV{PYTHONPATH} )
diff --git a/test/plovasp/atm/test_atm.py b/test/plovasp/atm/test_atm.py
index 913fc40a..864d93b8 100644
--- a/test/plovasp/atm/test_atm.py
+++ b/test/plovasp/atm/test_atm.py
@@ -2,7 +2,7 @@
 import os
 
 import numpy as np
-from converters.plovasp.atm import dos_tetra_weights_3d
+from triqs_dft_tools.converters.plovasp.atm import dos_tetra_weights_3d
 import mytest
 
 ################################################################################
diff --git a/test/plovasp/inpconf/test_general.py b/test/plovasp/inpconf/test_general.py
index 14d04b3f..ce7770ee 100644
--- a/test/plovasp/inpconf/test_general.py
+++ b/test/plovasp/inpconf/test_general.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/inpconf/test_groups.py b/test/plovasp/inpconf/test_groups.py
index b1d7153f..e671ee15 100644
--- a/test/plovasp/inpconf/test_groups.py
+++ b/test/plovasp/inpconf/test_groups.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/inpconf/test_input.py b/test/plovasp/inpconf/test_input.py
index 9766ea1e..1bd589ce 100644
--- a/test/plovasp/inpconf/test_input.py
+++ b/test/plovasp/inpconf/test_input.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/inpconf/test_parameter_set.py b/test/plovasp/inpconf/test_parameter_set.py
index c6748086..f42b4f76 100644
--- a/test/plovasp/inpconf/test_parameter_set.py
+++ b/test/plovasp/inpconf/test_parameter_set.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/inpconf/test_shells.py b/test/plovasp/inpconf/test_shells.py
index 98220d2b..e4d3faa9 100644
--- a/test/plovasp/inpconf/test_shells.py
+++ b/test/plovasp/inpconf/test_shells.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/inpconf/test_special_parsers.py b/test/plovasp/inpconf/test_special_parsers.py
index a751f480..e7d52ec2 100644
--- a/test/plovasp/inpconf/test_special_parsers.py
+++ b/test/plovasp/inpconf/test_special_parsers.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import arraytest
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
 
 ################################################################################
 #
diff --git a/test/plovasp/plocar_io/test_fileio.py b/test/plovasp/plocar_io/test_fileio.py
index 59e013af..fc6c2bed 100644
--- a/test/plovasp/plocar_io/test_fileio.py
+++ b/test/plovasp/plocar_io/test_fileio.py
@@ -3,7 +3,7 @@ Tests of 'read_plocar()' from module 'plocar_io.c_plocar_io'
 """
 import mytest
 import numpy as np
-from plocar_io.c_plocar_io import read_plocar
+from triqs_dft_tools.plocar_io.c_plocar_io import read_plocar
 
 ################################################################################
 #
diff --git a/test/plovasp/plotools/test_consistency.py b/test/plovasp/plotools/test_consistency.py
index 216e89f7..8b79935c 100644
--- a/test/plovasp/plotools/test_consistency.py
+++ b/test/plovasp/plotools/test_consistency.py
@@ -1,8 +1,8 @@
 
-import converters.plovasp.vaspio
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.plotools import check_data_consistency
-from converters.plovasp.elstruct import ElectronicStructure
+import triqs_dft_tools.converters.plovasp.vaspio
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.plotools import check_data_consistency
+from triqs_dft_tools.converters.plovasp.elstruct import ElectronicStructure
 import mytest
 
 ################################################################################
diff --git a/test/plovasp/proj_group/test_block_map.py b/test/plovasp/proj_group/test_block_map.py
index 80d6fd04..27570c0e 100644
--- a/test/plovasp/proj_group/test_block_map.py
+++ b/test/plovasp/proj_group/test_block_map.py
@@ -4,9 +4,9 @@ import rpath
 _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import numpy as np
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.proj_shell import ProjectorShell
-from converters.plovasp.proj_group import ProjectorGroup
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.proj_shell import ProjectorShell
+from triqs_dft_tools.converters.plovasp.proj_group import ProjectorGroup
 import mytest
 
 ################################################################################
diff --git a/test/plovasp/proj_group/test_one_site.py b/test/plovasp/proj_group/test_one_site.py
index 8a777d10..cdb4d33c 100644
--- a/test/plovasp/proj_group/test_one_site.py
+++ b/test/plovasp/proj_group/test_one_site.py
@@ -4,11 +4,11 @@ import rpath
 _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import numpy as np
-from converters.plovasp.vaspio import VaspData
-from converters.plovasp.elstruct import ElectronicStructure
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.proj_shell import ProjectorShell
-from converters.plovasp.proj_group import ProjectorGroup
+from triqs_dft_tools.converters.plovasp.vaspio import VaspData
+from triqs_dft_tools.converters.plovasp.elstruct import ElectronicStructure
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.proj_shell import ProjectorShell
+from triqs_dft_tools.converters.plovasp.proj_group import ProjectorGroup
 from pytriqs.archive import HDFArchive
 import mytest
 
diff --git a/test/plovasp/proj_group/test_select_bands.py b/test/plovasp/proj_group/test_select_bands.py
index 4d53c42b..10f59ef8 100644
--- a/test/plovasp/proj_group/test_select_bands.py
+++ b/test/plovasp/proj_group/test_select_bands.py
@@ -4,11 +4,11 @@ import rpath
 _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import numpy as np
-from converters.plovasp.vaspio import VaspData
-from converters.plovasp.elstruct import ElectronicStructure
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.proj_shell import ProjectorShell
-from converters.plovasp.proj_group import ProjectorGroup
+from triqs_dft_tools.converters.plovasp.vaspio import VaspData
+from triqs_dft_tools.converters.plovasp.elstruct import ElectronicStructure
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.proj_shell import ProjectorShell
+from triqs_dft_tools.converters.plovasp.proj_group import ProjectorGroup
 import mytest
 
 ################################################################################
diff --git a/test/plovasp/proj_group/test_two_site.py b/test/plovasp/proj_group/test_two_site.py
index 8db9b951..f3959447 100644
--- a/test/plovasp/proj_group/test_two_site.py
+++ b/test/plovasp/proj_group/test_two_site.py
@@ -4,11 +4,11 @@ import rpath
 _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import numpy as np
-from converters.plovasp.vaspio import VaspData
-from converters.plovasp.elstruct import ElectronicStructure
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.proj_shell import ProjectorShell
-from converters.plovasp.proj_group import ProjectorGroup
+from triqs_dft_tools.converters.plovasp.vaspio import VaspData
+from triqs_dft_tools.converters.plovasp.elstruct import ElectronicStructure
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.proj_shell import ProjectorShell
+from triqs_dft_tools.converters.plovasp.proj_group import ProjectorGroup
 from pytriqs.archive import HDFArchive
 import mytest
 
diff --git a/test/plovasp/proj_shell/test_projshells.py b/test/plovasp/proj_shell/test_projshells.py
index 97e1693f..244821b8 100644
--- a/test/plovasp/proj_shell/test_projshells.py
+++ b/test/plovasp/proj_shell/test_projshells.py
@@ -4,11 +4,11 @@ import rpath
 _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import numpy as np
-from converters.plovasp.vaspio import VaspData
-from converters.plovasp.elstruct import ElectronicStructure
-from converters.plovasp.inpconf import ConfigParameters
-from converters.plovasp.proj_shell import ProjectorShell
-from converters.plovasp.proj_group import ProjectorGroup
+from triqs_dft_tools.converters.plovasp.vaspio import VaspData
+from triqs_dft_tools.converters.plovasp.elstruct import ElectronicStructure
+from triqs_dft_tools.converters.plovasp.inpconf import ConfigParameters
+from triqs_dft_tools.converters.plovasp.proj_shell import ProjectorShell
+from triqs_dft_tools.converters.plovasp.proj_group import ProjectorGroup
 import mytest
 
 ################################################################################
diff --git a/test/plovasp/vaspio/test_doscar.py b/test/plovasp/vaspio/test_doscar.py
index 68148d75..8c43f8f2 100644
--- a/test/plovasp/vaspio/test_doscar.py
+++ b/test/plovasp/vaspio/test_doscar.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import mytest
 import numpy as np
-from converters.plovasp.vaspio import Doscar
+from triqs_dft_tools.converters.plovasp.vaspio import Doscar
 
 ################################################################################
 #
diff --git a/test/plovasp/vaspio/test_eigenval.py b/test/plovasp/vaspio/test_eigenval.py
index 4cca5a8d..ec3264e8 100644
--- a/test/plovasp/vaspio/test_eigenval.py
+++ b/test/plovasp/vaspio/test_eigenval.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import mytest
 import numpy as np
-from converters.plovasp.vaspio import Eigenval
+from triqs_dft_tools.converters.plovasp.vaspio import Eigenval
 
 ################################################################################
 #
diff --git a/test/plovasp/vaspio/test_kpoints.py b/test/plovasp/vaspio/test_kpoints.py
index 43f67ef3..f7410c3b 100644
--- a/test/plovasp/vaspio/test_kpoints.py
+++ b/test/plovasp/vaspio/test_kpoints.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import mytest
 import numpy as np
-from converters.plovasp.vaspio import Kpoints
+from triqs_dft_tools.converters.plovasp.vaspio import Kpoints
 
 ################################################################################
 #
diff --git a/test/plovasp/vaspio/test_poscar.py b/test/plovasp/vaspio/test_poscar.py
index 25d37080..3ec48e16 100644
--- a/test/plovasp/vaspio/test_poscar.py
+++ b/test/plovasp/vaspio/test_poscar.py
@@ -7,7 +7,7 @@ _rpath = os.path.dirname(rpath.__file__) + '/'
 
 import mytest
 import numpy as np
-from converters.plovasp.vaspio import Poscar
+from triqs_dft_tools.converters.plovasp.vaspio import Poscar
 
 ################################################################################
 #
diff --git a/test/sigma_from_file.py b/test/sigma_from_file.py
index ccf88280..ac4a83cd 100644
--- a/test/sigma_from_file.py
+++ b/test/sigma_from_file.py
@@ -22,7 +22,7 @@
 from pytriqs.archive import *
 from pytriqs.gf import *
 from pytriqs.gf.tools import *
-from sumk_dft_tools import *
+from triqs_dft_tools.sumk_dft_tools import *
 from pytriqs.utility.comparison_tests import *
 import numpy as np
 
diff --git a/test/srvo3_Gloc.py b/test/srvo3_Gloc.py
index 16988433..181101c2 100644
--- a/test/srvo3_Gloc.py
+++ b/test/srvo3_Gloc.py
@@ -21,8 +21,8 @@
 
 from pytriqs.archive import *
 from pytriqs.gf import *
-from sumk_dft import *
-from converters.wien2k_converter import *
+from triqs_dft_tools.sumk_dft import *
+from triqs_dft_tools.converters.wien2k_converter import *
 from pytriqs.operators.util import set_operator_structure
 from pytriqs.utility.comparison_tests import *
 from pytriqs.utility.h5diff import h5diff
diff --git a/test/srvo3_transp.py b/test/srvo3_transp.py
index 0ec8b91c..91b612b2 100644
--- a/test/srvo3_transp.py
+++ b/test/srvo3_transp.py
@@ -20,9 +20,9 @@
 ################################################################################
 
 from numpy import *
-from converters.wien2k_converter import *
-from sumk_dft import *
-from sumk_dft_tools import *
+from triqs_dft_tools.converters.wien2k_converter import *
+from triqs_dft_tools.sumk_dft import *
+from triqs_dft_tools.sumk_dft_tools import *
 from pytriqs.utility.comparison_tests import *
 from pytriqs.utility.h5diff import h5diff 
 
diff --git a/test/sumkdft_basic.py b/test/sumkdft_basic.py
index 52dd1a48..7f41b816 100644
--- a/test/sumkdft_basic.py
+++ b/test/sumkdft_basic.py
@@ -21,7 +21,7 @@
 ################################################################################
 
 from pytriqs.archive import *
-from sumk_dft_tools import SumkDFTTools
+from triqs_dft_tools.sumk_dft_tools import SumkDFTTools
 import pytriqs.utility.mpi as mpi
 from pytriqs.utility.comparison_tests import *
 from pytriqs.utility.h5diff import h5diff 
diff --git a/test/w90_convert.py b/test/w90_convert.py
index 1c483e50..5ab531e2 100644
--- a/test/w90_convert.py
+++ b/test/w90_convert.py
@@ -21,7 +21,7 @@
 ################################################################################
 
 
-from converters import *
+from triqs_dft_tools.converters import *
 from pytriqs.archive import *
 from pytriqs.utility.h5diff import h5diff
 import pytriqs.utility.mpi as mpi
diff --git a/test/wien2k_convert.py b/test/wien2k_convert.py
index 77076068..215200fc 100644
--- a/test/wien2k_convert.py
+++ b/test/wien2k_convert.py
@@ -25,7 +25,7 @@ from pytriqs.utility.comparison_tests import *
 from pytriqs.utility.h5diff import h5diff 
 import pytriqs.utility.mpi as mpi
 
-from converters import Wien2kConverter
+from triqs_dft_tools.converters import Wien2kConverter
 
 Converter = Wien2kConverter(filename='SrVO3')
 Converter.hdf_file = 'wien2k_convert.out.h5'