diff --git a/dist/tools/ci/static_tests.sh b/dist/tools/ci/static_tests.sh
index 37579ae40c..0e5b91f6c3 100755
--- a/dist/tools/ci/static_tests.sh
+++ b/dist/tools/ci/static_tests.sh
@@ -10,7 +10,7 @@
 # directory for more details.
 #
 
-. $(dirname "$0")/github_annotate.sh
+. "$(dirname "${0}")"/github_annotate.sh
 
 declare -A DEPS
 
@@ -24,7 +24,7 @@ DEPS["./dist/tools/codespell/check.sh"]="codespell"
 DEPS["./dist/tools/uncrustify/uncrustify.sh"]="uncrustify"
 DEPS["./dist/tools/shellcheck/shellcheck.sh"]="shellcheck"
 
-if ! command -v git 2>&1 1>/dev/null; then
+if ! command -v git &>/dev/null; then
     echo -n "Required command 'git' for all static tests not found in PATH "
     print_warning
     set_result 1
@@ -61,7 +61,7 @@ set_result() {
 
 function run {
     for dep in ${DEPS["$1"]}; do
-        if ! command -v ${dep} 2>&1 1>/dev/null; then
+        if ! command -v ${dep} &>/dev/null; then
             echo -n "Required command '${dep}' for '$*' not found in PATH "
             print_warning
             set_result 1