diff --git a/.travis/custom.sh b/.travis/custom.sh
index 1b290d0..ac58205 100755
--- a/.travis/custom.sh
+++ b/.travis/custom.sh
@@ -3,9 +3,9 @@
 
 # This script is executed with two arguments passed to it:
 #
-#   $1 - full path to environment python (python used inside virtual
-#        environment created by tox)
-#   $2 - full path to system python (python 3.x installed on the system)
+#   $1 - path to environment python (python used inside virtual environment
+#        created by tox)
+#   $2 - path to system python (python 3.x installed on the system)
 
 set -e
 
@@ -17,8 +17,9 @@ TOPDIR=$(readlink -f ${SCRIPTDIR}/..)
 . ${SCRIPTDIR}/utils.sh
 . ${SCRIPTDIR}/config.sh
 
-ENVPYTHON=$1
-SYSPYTHON=$2
+# Sanitize arguments (see https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
+SYSPYTHON=$(readlink -f $2)
 shift 2
 
 # Write your custom commands here that should be run when `tox -e custom`:
diff --git a/.travis/runblack.sh b/.travis/runblack.sh
index 0dd0b44..33faa53 100755
--- a/.travis/runblack.sh
+++ b/.travis/runblack.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 # SPDX-License-Identifier: MIT
 
-# Run black (the Python formatter). The first script argument is a full path
-# to Python interpreter, the rest of arguments are passed to black.
+# Run black (the Python formatter). The first script argument is a path to
+# Python interpreter, the rest of arguments are passed to black.
 
 # Environment variables:
 #
@@ -31,7 +31,9 @@ if [[ "${RUN_BLACK_DISABLED}" ]]; then
   exit 0
 fi
 
-ENVPYTHON=$1
+# Sanitize path in case if running within tox (see
+# https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
 shift
 
 DEFAULT_INCLUDE='^[^.].*\.py$'
diff --git a/.travis/runcoveralls.sh b/.travis/runcoveralls.sh
index 466ae07..f359c45 100755
--- a/.travis/runcoveralls.sh
+++ b/.travis/runcoveralls.sh
@@ -4,8 +4,8 @@
 # Report coverage results using coveralls. The script is executed with these
 # parameters:
 #
-#   $1 - full path to environment python
-#   $2 - full path to system python
+#   $1 - path to environment python
+#   $2 - path to system python
 #
 # coveralls is executed only if $1 coincides with $2 and $1's environment is
 # stable, i.e. TRAVIS_PYTHON_VERSION is of the form [:digit:] "." [:digit:]
@@ -32,8 +32,9 @@ if [[ -z "${LSR_PUBLISH_COVERAGE}" ]]; then
   exit 0
 fi
 
-ENVPYTHON=$1
-SYSPYTHON=$2
+# Sanitize arguments (see https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
+SYSPYTHON=$(readlink -f $2)
 shift 2
 
 if lsr_compare_pythons ${ENVPYTHON} -ne ${SYSPYTHON}; then
diff --git a/.travis/runflake8.sh b/.travis/runflake8.sh
index 72fd94a..9e048a6 100755
--- a/.travis/runflake8.sh
+++ b/.travis/runflake8.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 # SPDX-License-Identifier: MIT
 
-# Run flake8. The first script argument is a full path to Python interpreter,
-# the rest of arguments are passed to flake8.
+# Run flake8. The first script argument is a path to Python interpreter, the
+# rest of arguments are passed to flake8.
 
 # Environment variables:
 #
@@ -23,7 +23,9 @@ if [[ "${RUN_FLAKE8_DISABLED}" ]]; then
   exit 0
 fi
 
-ENVPYTHON=$1
+# Sanitize path in case if running within tox (see
+# https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
 shift
 
 set -x
diff --git a/.travis/runpytest.sh b/.travis/runpytest.sh
index 33b32b5..eda5c9d 100755
--- a/.travis/runpytest.sh
+++ b/.travis/runpytest.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 # SPDX-License-Identifier: MIT
 
-# Wrapper around pytest. First argument is a full path to environment python,
-# the rest of arguments are passed to pytest.
+# Wrapper around pytest. First argument is a path to environment python, the
+# rest of arguments are passed to pytest.
 
 set -e
 
@@ -18,7 +18,9 @@ if [[ ! -d ${TOPDIR}/tests/unit ]]; then
   exit 0
 fi
 
-ENVPYTHON=$1
+# Sanitize path in case if running within tox (see
+# https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
 shift
 
 PYTEST_OPTS=()
diff --git a/.travis/runsyspycmd.sh b/.travis/runsyspycmd.sh
index ff36ed9..7865924 100755
--- a/.travis/runsyspycmd.sh
+++ b/.travis/runsyspycmd.sh
@@ -5,8 +5,8 @@
 # to system python libraries, especially C bindings. The script is run with
 # these arguments:
 #
-#   $1     - full path to environment python
-#   $2     - full path to system python
+#   $1     - path to environment python
+#   $2     - path to system python
 #   $3     - command runnable in Python (should be present in $PATH)
 #   ${@:4} - arguments passed to $3
 
@@ -23,8 +23,9 @@ TOPDIR=$(readlink -f ${SCRIPTDIR}/..)
 # Run user defined hook from .travis/config.sh.
 lsr_runsyspycmd_hook "$@"
 
-ENVPYTHON=$1
-SYSPYTHON=$2
+# Sanitize arguments (see https://github.com/tox-dev/tox/issues/1463):
+ENVPYTHON=$(readlink -f $1)
+SYSPYTHON=$(readlink -f $2)
 shift 2
 
 if lsr_compare_pythons ${ENVPYTHON} -ne ${SYSPYTHON}; then