diff --git a/tools/bazel/.noserc b/tools/bazel/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/tools/bazel/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/tools/bazel/pytest.ini b/tools/bazel/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/tools/bazel/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/tools/bazel/tests/Makefile b/tools/bazel/tests/Makefile
index 0b76d82bce..8f32c38a24 100644
--- a/tools/bazel/tests/Makefile
+++ b/tools/bazel/tests/Makefile
@@ -5,8 +5,8 @@ TEST_PROJECT ?= TEST_PROJ=$(CURRENT_DIR)/tests/projects
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: pycodestyle pylint test_unit
 
@@ -31,7 +31,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) $(TEST_PROJECT) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
diff --git a/tools/bazel/tests/unit/__init__.py b/tools/bazel/tests/unit/__init__.py
index 4259749345..6f7442b714 100644
--- a/tools/bazel/tests/unit/__init__.py
+++ b/tools/bazel/tests/unit/__init__.py
@@ -5,3 +5,21 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+"""
+Setup python modules for the unit tests.
+"""
+
+
+import os
+import sys
+
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
+
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
+
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/tools/report-converter/.noserc b/tools/report-converter/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/tools/report-converter/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/tools/report-converter/pytest.ini b/tools/report-converter/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/tools/report-converter/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/tools/report-converter/tests/Makefile b/tools/report-converter/tests/Makefile
index 5099dc2ee3..9aa60b8c92 100644
--- a/tools/report-converter/tests/Makefile
+++ b/tools/report-converter/tests/Makefile
@@ -7,8 +7,8 @@ TEST_PROJECT ?= TEST_PROJ=$(CURRENT_DIR)/tests/projects
 
 LAYOUT_DIR ?= LAYOUT_DIR=$(STATIC_DIR)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: mypy pycodestyle pylint test_unit test_functional
 
@@ -41,7 +41,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) $(TEST_PROJECT) $(LAYOUT_DIR) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
@@ -50,7 +50,7 @@ test_unit_in_env: venv_dev
 	$(ACTIVATE_DEV_VENV) && $(UNIT_TEST_CMD)
 
 FUNCTIONAL_TEST_CMD = $(REPO_ROOT) $(TEST_PROJECT) \
-  nosetests $(NOSECFG) tests/functional
+  pytest $(PYTESTCFG) tests/functional
 
 test_functional:
 	$(FUNCTIONAL_TEST_CMD)
diff --git a/tools/report-converter/tests/functional/__init__.py b/tools/report-converter/tests/functional/__init__.py
index 4259749345..6f7442b714 100644
--- a/tools/report-converter/tests/functional/__init__.py
+++ b/tools/report-converter/tests/functional/__init__.py
@@ -5,3 +5,21 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+"""
+Setup python modules for the unit tests.
+"""
+
+
+import os
+import sys
+
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
+
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
+
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/tools/report-converter/tests/functional/cmdline/test_cmdline.py b/tools/report-converter/tests/functional/cmdline/test_cmdline.py
index 8921bf237a..80a12839bf 100644
--- a/tools/report-converter/tests/functional/cmdline/test_cmdline.py
+++ b/tools/report-converter/tests/functional/cmdline/test_cmdline.py
@@ -23,7 +23,9 @@ class TestCmdline(unittest.TestCase):
 
     def test_help(self):
         """ Get help for report-converter tool. """
-        ret = subprocess.call(['report-converter', '--help'])
+        ret = subprocess.call(['report-converter', '--help'],
+                              stdout=subprocess.PIPE,
+                              stderr=subprocess.PIPE)
         self.assertEqual(0, ret)
 
     def test_metadata(self):
diff --git a/tools/report-converter/tests/unit/__init__.py b/tools/report-converter/tests/unit/__init__.py
index 4259749345..6f7442b714 100644
--- a/tools/report-converter/tests/unit/__init__.py
+++ b/tools/report-converter/tests/unit/__init__.py
@@ -5,3 +5,21 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+"""
+Setup python modules for the unit tests.
+"""
+
+
+import os
+import sys
+
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
+
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
+
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/tools/report-converter/tests/unit/output/gerrit/__init__.py b/tools/report-converter/tests/unit/output/gerrit/__init__.py
index cea05ef6e6..0b0114f7e4 100644
--- a/tools/report-converter/tests/unit/output/gerrit/__init__.py
+++ b/tools/report-converter/tests/unit/output/gerrit/__init__.py
@@ -6,34 +6,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
-""" Setup for the test package analyze. """
 
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """ Setup the environment for the tests. """
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('plist_to_html')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """ Delete the workspace associated with this test. """
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/tools/report-converter/tests/unit/output/gerrit/test_gerrit_converter.py b/tools/report-converter/tests/unit/output/gerrit/test_gerrit_converter.py
index b02593ad5e..daef84a8c7 100644
--- a/tools/report-converter/tests/unit/output/gerrit/test_gerrit_converter.py
+++ b/tools/report-converter/tests/unit/output/gerrit/test_gerrit_converter.py
@@ -63,7 +63,7 @@ def test_report_to_gerrit_conversion(self):
                 ]
             },
         }
-        self.assertEquals(res, expected)
+        self.assertEqual(res, expected)
 
     def test_report_to_gerrit_conversion_abs_filepath(self):
         """ Conversion report with absolute filepath. """
@@ -94,7 +94,7 @@ def test_report_to_gerrit_conversion_abs_filepath(self):
                 ]
             },
         }
-        self.assertEquals(res, expected)
+        self.assertEqual(res, expected)
 
     def test_report_to_gerrit_conversion_report_url(self):
         """ Conversion report with absolute filepath and CC_REPORT_URL env. """
@@ -127,7 +127,7 @@ def test_report_to_gerrit_conversion_report_url(self):
                 ]
             },
         }
-        self.assertEquals(res, expected)
+        self.assertEqual(res, expected)
 
     def test_report_to_gerrit_conversion_filter_changed_files(self):
         """Conversion report with changed files filter.
@@ -173,10 +173,10 @@ def test_report_to_gerrit_conversion_filter_changed_files(self):
         review_comments = res["comments"]
 
         # Reports were found in two source files.
-        self.assertEquals(len(review_comments), 1)
+        self.assertEqual(len(review_comments), 1)
 
         # Two reports in the main.cpp file.
-        self.assertEquals(len(review_comments[report.file.path]), 2)
+        self.assertEqual(len(review_comments[report.file.path]), 2)
 
         self.assertIn(
             "CodeChecker found 3 issue(s) in the code.", res["message"])
diff --git a/tools/report-converter/tests/unit/output/html/__init__.py b/tools/report-converter/tests/unit/output/html/__init__.py
index cea05ef6e6..0b0114f7e4 100644
--- a/tools/report-converter/tests/unit/output/html/__init__.py
+++ b/tools/report-converter/tests/unit/output/html/__init__.py
@@ -6,34 +6,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
-""" Setup for the test package analyze. """
 
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """ Setup the environment for the tests. """
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('plist_to_html')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """ Delete the workspace associated with this test. """
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/tools/report-converter/tests/unit/output/html/plist_to_html_test.py b/tools/report-converter/tests/unit/output/html/plist_to_html_test.py
index 356a7c94b3..68bfa75060 100644
--- a/tools/report-converter/tests/unit/output/html/plist_to_html_test.py
+++ b/tools/report-converter/tests/unit/output/html/plist_to_html_test.py
@@ -31,9 +31,14 @@ class PlistToHtmlTest(unittest.TestCase):
     test_workspace: ClassVar[str]
     layout_dir: ClassVar[str]
 
-    @classmethod
-    def setUpClass(self):
+    def setup_class(self):
         """ Initialize test files. """
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('plist_to_html')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
         self.test_workspace = os.environ['TEST_WORKSPACE']
         self.layout_dir = os.environ['LAYOUT_DIR']
 
@@ -56,6 +61,16 @@ def setUpClass(self):
                         plist_file.truncate()
                         plist_file.write(new_content)
 
+    def teardown_class(self):
+        """ Delete the workspace associated with this test. """
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
     def __test_html_builder(self, proj: str) -> str:
         """
         Test building html file from the given proj's plist file.
diff --git a/tools/report-converter/tests/unit/parser/__init__.py b/tools/report-converter/tests/unit/parser/__init__.py
index 4259749345..9cfe35318f 100644
--- a/tools/report-converter/tests/unit/parser/__init__.py
+++ b/tools/report-converter/tests/unit/parser/__init__.py
@@ -5,3 +5,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/tools/report-converter/tests/unit/parser/plist/__init__.py b/tools/report-converter/tests/unit/parser/plist/__init__.py
index 4259749345..9cfe35318f 100644
--- a/tools/report-converter/tests/unit/parser/plist/__init__.py
+++ b/tools/report-converter/tests/unit/parser/plist/__init__.py
@@ -5,3 +5,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/tools/report-converter/tests/unit/report_hash/__init__.py b/tools/report-converter/tests/unit/report_hash/__init__.py
index 03039caa4b..0b0114f7e4 100644
--- a/tools/report-converter/tests/unit/report_hash/__init__.py
+++ b/tools/report-converter/tests/unit/report_hash/__init__.py
@@ -6,54 +6,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
-""" Setup for the test package analyze. """
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import absolute_import
-
-import os
-import shutil
-import tempfile
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def get_workspace(test_id='test'):
-    """ Return a temporary workspace for the tests. """
-    workspace_root = os.environ.get("CC_REPORT_HASH_TEST_WORKSPACE_ROOT")
-    if not workspace_root:
-        # if no external workspace is set create under the build dir
-        workspace_root = os.path.join(os.environ['REPO_ROOT'], 'build',
-                                      'workspace')
-
-    if not os.path.exists(workspace_root):
-        os.makedirs(workspace_root)
-
-    if test_id:
-        return tempfile.mkdtemp(prefix=test_id + "-", dir=workspace_root)
-    else:
-        return workspace_root
-
-
-def setup_package():
-    """ Setup the environment for the tests. """
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = get_workspace('report_hash')
-
-    print(TEST_WORKSPACE)
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """ Delete the workspace associated with this test. """
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/tools/tu_collector/.noserc b/tools/tu_collector/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/tools/tu_collector/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/tools/tu_collector/pytest.ini b/tools/tu_collector/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/tools/tu_collector/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/tools/tu_collector/tests/Makefile b/tools/tu_collector/tests/Makefile
index 4dc2986ad0..c7ee5b7eee 100644
--- a/tools/tu_collector/tests/Makefile
+++ b/tools/tu_collector/tests/Makefile
@@ -5,8 +5,8 @@ TEST_PROJECT ?= TEST_PROJ=$(CURRENT_DIR)/tests/projects
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: mypy pycodestyle pylint test_unit
 
@@ -38,7 +38,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) $(TEST_PROJECT) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
diff --git a/tools/tu_collector/tests/unit/__init__.py b/tools/tu_collector/tests/unit/__init__.py
index 9f154b3f21..6f7442b714 100644
--- a/tools/tu_collector/tests/unit/__init__.py
+++ b/tools/tu_collector/tests/unit/__init__.py
@@ -1,4 +1,3 @@
-# coding=utf-8
 # -------------------------------------------------------------------------
 #
 #  Part of the CodeChecker project, under the Apache License v2.0 with
@@ -6,50 +5,21 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
-""" Setup for the test package tu_collector. """
+"""
+Setup python modules for the unit tests.
+"""
 
-import os
-import shutil
-import tempfile
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def get_workspace(test_id='test'):
-    """ Return a temporary workspace for the tests. """
-    workspace_root = os.environ.get("TU_COLLECTOR_TEST_WORKSPACE_ROOT")
-    if not workspace_root:
-        # if no external workspace is set create under the build dir
-        workspace_root = os.path.join(os.environ['REPO_ROOT'], 'build',
-                                      'workspace')
-
-    if not os.path.exists(workspace_root):
-        os.makedirs(workspace_root)
-
-    if test_id:
-        return tempfile.mkdtemp(prefix=test_id + "-", dir=workspace_root)
-    else:
-        return workspace_root
-
-
-def setup_package():
-    """ Setup the environment for the tests. """
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = get_workspace('tu_collector')
-
-    print(TEST_WORKSPACE)
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
 
+import os
+import sys
 
-def teardown_package():
-    """ Delete the workspace associated with this test. """
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
 
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
 
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))