diff --git a/bin/phpunit-or-pest b/bin/phpunit-or-pest
new file mode 100755
index 0000000..781b712
--- /dev/null
+++ b/bin/phpunit-or-pest
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+if [[ -f "vendor/bin/pest" ]]; then
+  echo "pest"
+  exit 0
+fi
+
+echo "phpunit"
diff --git a/tag-zsh/zsh/configs/aliases.zsh b/tag-zsh/zsh/configs/aliases.zsh
index 678d0a5..a840741 100644
--- a/tag-zsh/zsh/configs/aliases.zsh
+++ b/tag-zsh/zsh/configs/aliases.zsh
@@ -2,8 +2,6 @@ alias c="clear"
 alias l="ls -lah"
 alias m=make
 alias mkdir="mkdir -p"
-alias p=phpunit
-alias pf=phpunit --filter
 alias s=symfony
 alias v=vagrant
 
diff --git a/tag-zsh/zsh/configs/functions.zsh b/tag-zsh/zsh/configs/functions.zsh
index 0a963f4..1f81ffe 100644
--- a/tag-zsh/zsh/configs/functions.zsh
+++ b/tag-zsh/zsh/configs/functions.zsh
@@ -21,3 +21,11 @@ function db {
 
 is_linux() { [[ "$(uname)" == 'Linux'  ]] }
 is_macos() { [[ "$(uname)" == "Darwin" ]] }
+
+# Run 'phpunit' or 'pest' depending on the project.
+function p () {
+  vendor/bin/$(phpunit-or-pest) $*;
+}
+function pf () {
+  vendor/bin/$(phpunit-or-pest) --filter $*
+}