diff --git a/Dockerfile--altlinux_10.tmpl b/Dockerfile--altlinux_10.tmpl
index e82c9398..6b7ad40c 100644
--- a/Dockerfile--altlinux_10.tmpl
+++ b/Dockerfile--altlinux_10.tmpl
@@ -3,7 +3,6 @@ ARG PYTHON_VERSION
 
 # --------------------------------------------- base1
 FROM alt:p10 as base1
-ARG PG_VERSION
 
 RUN apt-get update
 RUN apt-get install -y sudo curl ca-certificates
@@ -66,7 +65,7 @@ RUN apt-get install -y python3
 RUN apt-get install -y python3-dev
 RUN apt-get install -y python3-modules-sqlite3
 
-ENV PYTHON_VERSION=3
+ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} as final
@@ -76,9 +75,8 @@ RUN adduser test -G wheel
 # It enables execution of "sudo service ssh start" without password
 RUN sh -c "echo \"WHEEL_USERS ALL=(ALL:ALL) NOPASSWD: ALL\"" >> /etc/sudoers
 
-ADD . /pg/testgres
+ADD --chown=test:test . /pg/testgres
 WORKDIR /pg/testgres
-RUN chown -R test /pg/testgres
 
 ENV LANG=C.UTF-8
 
diff --git a/Dockerfile--altlinux_11.tmpl b/Dockerfile--altlinux_11.tmpl
index cf549926..e56db9c4 100644
--- a/Dockerfile--altlinux_11.tmpl
+++ b/Dockerfile--altlinux_11.tmpl
@@ -3,7 +3,6 @@ ARG PYTHON_VERSION
 
 # --------------------------------------------- base1
 FROM alt:p11 as base1
-ARG PG_VERSION
 
 RUN apt-get update
 RUN apt-get install -y sudo curl ca-certificates
@@ -69,7 +68,7 @@ RUN apt-get install -y python3
 RUN apt-get install -y python3-dev
 RUN apt-get install -y python3-modules-sqlite3
 
-ENV PYTHON_VERSION=3
+ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} as final
@@ -79,9 +78,8 @@ RUN adduser test -G wheel
 # It enables execution of "sudo service ssh start" without password
 RUN sh -c "echo \"WHEEL_USERS ALL=(ALL:ALL) NOPASSWD: ALL\"" >> /etc/sudoers
 
-ADD . /pg/testgres
+ADD --chown=test:test . /pg/testgres
 WORKDIR /pg/testgres
-RUN chown -R test /pg/testgres
 
 ENV LANG=C.UTF-8
 
diff --git a/Dockerfile--std-all.tmpl b/Dockerfile--std-all.tmpl
index 7ebb6194..170f53f9 100644
--- a/Dockerfile--std-all.tmpl
+++ b/Dockerfile--std-all.tmpl
@@ -7,7 +7,7 @@ FROM postgres:${PG_VERSION}-alpine as base1
 # --------------------------------------------- base2_with_python-3
 FROM base1 as base2_with_python-3
 RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
-ENV PYTHON_VERSION=3
+ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} as final
@@ -29,9 +29,8 @@ RUN adduser postgres sudo
 EXPOSE 22
 RUN ssh-keygen -A
 
-ADD . /pg/testgres
+ADD --chown=postgres:postgres . /pg/testgres
 WORKDIR /pg/testgres
-RUN chown -R postgres:postgres /pg
 
 # It allows to use sudo without password
 RUN sh -c "echo \"postgres ALL=(ALL:ALL) NOPASSWD:ALL\"">>/etc/sudoers
diff --git a/Dockerfile--std.tmpl b/Dockerfile--std.tmpl
index 76e004f0..f1ba65df 100644
--- a/Dockerfile--std.tmpl
+++ b/Dockerfile--std.tmpl
@@ -7,7 +7,7 @@ FROM postgres:${PG_VERSION}-alpine as base1
 # --------------------------------------------- base2_with_python-3
 FROM base1 as base2_with_python-3
 RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
-ENV PYTHON_VERSION=3
+ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} as final
@@ -16,9 +16,8 @@ RUN apk add --no-cache git
 
 ENV LANG=C.UTF-8
 
-ADD . /pg/testgres
+ADD --chown=postgres:postgres . /pg/testgres
 WORKDIR /pg/testgres
-RUN chown -R postgres:postgres /pg
 
 USER postgres
 ENTRYPOINT bash run_tests.sh
diff --git a/Dockerfile--std2-all.tmpl b/Dockerfile--std2-all.tmpl
index 195f0665..0a695240 100644
--- a/Dockerfile--std2-all.tmpl
+++ b/Dockerfile--std2-all.tmpl
@@ -6,6 +6,7 @@ FROM postgres:${PG_VERSION}-alpine as base1
 
 # --------------------------------------------- base2_with_python-3
 FROM base1 as base2_with_python-3
+ENV PYTHON_BINARY=python3
 RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
 
 # For pyenv
@@ -75,10 +76,6 @@ RUN adduser postgres sudo
 EXPOSE 22
 RUN ssh-keygen -A
 
-ADD . /pg/testgres
-WORKDIR /pg/testgres
-RUN chown -R postgres:postgres /pg
-
 # It allows to use sudo without password
 RUN sh -c "echo \"postgres ALL=(ALL:ALL) NOPASSWD:ALL\"">>/etc/sudoers
 
@@ -88,14 +85,15 @@ RUN sh -c "echo "postgres:*" | chpasswd -e"
 USER postgres
 
 RUN curl https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash
-
 RUN ~/.pyenv/bin/pyenv install ${PYTHON_VERSION}
 
+ADD --chown=postgres:postgres . /pg/testgres
+WORKDIR /pg/testgres
+
 # THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
 RUN chmod 700 ~/
 
 RUN mkdir -p ~/.ssh
-#RUN chmod 700 ~/.ssh
 
 ENTRYPOINT sh -c " \
 set -eux; \
diff --git a/Dockerfile--ubuntu_24_04.tmpl b/Dockerfile--ubuntu_24_04.tmpl
index ca26afea..f3846036 100644
--- a/Dockerfile--ubuntu_24_04.tmpl
+++ b/Dockerfile--ubuntu_24_04.tmpl
@@ -42,16 +42,15 @@ RUN sh -c "echo postgres ALL=NOPASSWD:/usr/sbin/service ssh start" >> /etc/sudoe
 # --------------------------------------------- base2_with_python-3
 FROM base1 as base2_with_python-3
 RUN apt install -y python3 python3-dev python3-venv libpq-dev build-essential
-ENV PYTHON_VERSION=3
+ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} as final
 
 RUN apt install -y git
 
-ADD . /pg/testgres
+ADD --chown=postgres:postgres . /pg/testgres
 WORKDIR /pg/testgres
-RUN chown -R postgres /pg
 
 ENV LANG=C.UTF-8
 
diff --git a/run_tests.sh b/run_tests.sh
index f4a978c6..04c4b2ae 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -13,7 +13,7 @@ command -v pg_config
 # prepare python environment
 VENV_PATH="/tmp/testgres_venv"
 rm -rf $VENV_PATH
-python${PYTHON_VERSION} -m venv "${VENV_PATH}"
+${PYTHON_BINARY} -m venv "${VENV_PATH}"
 export VIRTUAL_ENV_DISABLE_PROMPT=1
 source "${VENV_PATH}/bin/activate"
 pip install -r tests/requirements.txt
diff --git a/run_tests2.sh b/run_tests2.sh
index 4cb4cb4f..82b1b983 100755
--- a/run_tests2.sh
+++ b/run_tests2.sh
@@ -8,66 +8,4 @@ eval "$(pyenv virtualenv-init -)"
 pyenv virtualenv --force ${PYTHON_VERSION} cur
 pyenv activate cur
 
-if [ -z ${TEST_FILTER+x} ]; \
-then export TEST_FILTER="TestTestgresLocal or (TestTestgresCommon and (not remote))"; \
-fi
-
-# fail early
-echo check that pg_config is in PATH
-command -v pg_config
-
-# prepare python environment
-VENV_PATH="/tmp/testgres_venv"
-rm -rf $VENV_PATH
-python -m venv "${VENV_PATH}"
-export VIRTUAL_ENV_DISABLE_PROMPT=1
-source "${VENV_PATH}/bin/activate"
-pip install -r tests/requirements.txt
-
-# test code quality
-pip install flake8 flake8-pyproject
-flake8 .
-pip uninstall -y flake8 flake8-pyproject
-
-# remove existing coverage file
-export COVERAGE_FILE=.coverage
-rm -f $COVERAGE_FILE
-
-pip install coverage
-
-# run tests (PATH)
-time coverage run -a -m pytest -l -v -n 4 -k "${TEST_FILTER}"
-
-# run tests (PG_BIN)
-PG_BIN=$(pg_config --bindir) \
-time coverage run -a -m pytest -l -v -n 4 -k "${TEST_FILTER}"
-
-# run tests (PG_CONFIG)
-PG_CONFIG=$(pg_config --bindir)/pg_config \
-time coverage run -a -m pytest -l -v -n 4 -k "${TEST_FILTER}"
-
-# test pg8000
-pip uninstall -y psycopg2
-pip install pg8000
-PG_CONFIG=$(pg_config --bindir)/pg_config \
-time coverage run -a -m pytest -l -v -n 4 -k "${TEST_FILTER}"
-
-# show coverage
-coverage report
-
-pip uninstall -y coverage
-
-# build documentation
-pip install Sphinx
-
-cd docs
-make html
-cd ..
-
-pip uninstall -y Sphinx
-
-# attempt to fix codecov
-set +eux
-
-# send coverage stats to Codecov
-bash <(curl -s https://codecov.io/bash)
+./run_tests.sh