Apply suggestions from code review

Co-authored-by: Lara Ramona Peeters <49882639+laraPPr@users.noreply.github.com>

Author: laraPPr

run_tests.sh

@@ -22,7 +22,7 @@ source ${base_dir}/init/eessi_defaults
 TEST_CLONE="git clone https://github.com/EESSI/test-suite EESSI-test-suite && cd EESSI-test-suite"
 LATEST_VERSION="VERSION=\$(git tag | grep '^v[0-9]\+\.[0-9]\+\.[0-9]\+$' | sort -t. -k 1,1n -k 2,2n -k 3,3n | tail -n 1)"
 CHECKOUT_LATEST="git checkout \${VERSION}"
-DEBUG="getent hosts github.com && echo && echo DEBUG && curl -I https://github.com && env | grep -i proxy && git config --list | grep proxy && git ls-remote https://github.com/EESSI/test-suite/"
+DEBUG="getent hosts github.com && echo && echo DEBUG && nslookup github.com 10.141.10.246 && curl -v --connect-to ::140.82.121.4 https://github.com && curl -I https://github.com && env | grep -i proxy && git config --list | grep proxy && git ls-remote https://github.com/EESSI/test-suite/"
 
 # Git clone has to be run in compat layer, to make the git command available
 ./run_in_compat_layer_env.sh "${DEBUG} && ${TEST_CLONE} && ${LATEST_VERSION} && ${CHECKOUT_LATEST}"