diff --git a/tests/run-tests.bash b/tests/run-tests.bash
index f662a4a..c00beda 100755
--- a/tests/run-tests.bash
+++ b/tests/run-tests.bash
@@ -1,41 +1,20 @@
 #! /bin/bash
 
 # Run tests locally (as close as possible to Github Worflows).
-# It requires Nix (https://nixos.org/download)
+# It requires:
+# - Eask CLI (https://emacs-eask.github.io/)
+# - Nix (https://nixos.org/download)
+# - Enabling Nix 'nix-command' and 'flakes' experimental features (https://nixos.org/manual/nix/stable/command-ref/conf-file#conf-experimental-features)
 
-init_dir="/tmp/.emacs.d_jtsx_tests"
 emacs_versions=("emacs-29-1" "emacs-29-2" "emacs-snapshot")
 
-# Ensure that Emacs init dir is empty
-rm -rf $init_dir
-
-# Run tests on each Emacs versions
 for version in ${emacs_versions[@]}; do
-    emacs_nix="nix run --accept-flake-config github:purcell/nix-emacs-ci#$version --"
-    printf "RUN PACKAGE-LINT ON '%s'.\n" $version
-    if ! $emacs_nix --batch \
-         --eval "(progn \
-                (require 'package) \
-                (push '(\"melpa\" . \"https://melpa.org/packages/\") package-archives) \
-                (package-initialize) \
-                (unless package-archive-contents \
-                (package-refresh-contents)) \
-                (unless (package-installed-p 'package-lint) \
-                        (package-install 'package-lint)))" \
-         --eval "(require 'package-lint)" \
-         -f package-lint-batch-and-exit ../jtsx.el; then
-       printf "PACKAGE LINT FAILURE ON '%s'.\n" $version
+    printf "###### RUN TESTS ON '%s'. ######\n" $version
+    emacs_nix="github:purcell/nix-emacs-ci#$version"
+    if ! nix shell $emacs_nix nixpkgs#eask --command make -C ../ ci; then
+       printf "###### TESTS FAILURE ON '%s'. ######\n" $version
        exit
     fi
-    printf "RUN TESTS ON '%s'.\n" $version
-    if ! $emacs_nix --init-directory=$init_dir --batch -l ert -l ../jtsx.el -l jtsx-tests.el \
-         --eval "(jtsx-install-treesit-language 'javascript)" \
-         --eval "(jtsx-install-treesit-language 'tsx)" \
-         --eval "(jtsx-install-treesit-language 'typescript)" \
-         -f ert-run-tests-batch-and-exit; then
-        printf "TESTS FAILURE ON '%s'.\n" $version
-        exit
-    fi
 done
 
-echo "TESTS SUCCESS!"
+echo "###### TESTS SUCCESS! ######"