diff --git a/tools/linter b/tools/linter
index 6ddf8bcb..28394065 100755
--- a/tools/linter
+++ b/tools/linter
@@ -1,6 +1,6 @@
 # Run within root directory
 
-if [ $1 = "check" ]; then
+if [[ $1 = "check" ]]; then
     isort . --check-only --diff     \
       && black . --check            \
       && pylint src/                \
diff --git a/tools/test b/tools/test
index 71b26e1b..16915f28 100755
--- a/tools/test
+++ b/tools/test
@@ -1,6 +1,6 @@
 # Run within root directory
 
-if [ $1 = "html" ]; then
+if [[ $1 = "html" ]]; then
     coverage run -m pytest && coverage html
 else
     coverage run -m pytest && coverage report