diff --git a/Makefile b/Makefile
index bbc1d43..b2e666a 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ INSTALL?=install -c
 PREFIX?=/usr/local
 SHARE_DIR?=$(DESTDIR)$(PREFIX)/share/$(NAME)
 DOC_DIR?=$(DESTDIR)$(PREFIX)/share/doc/$(NAME)
-ZSH?=zsh # zsh binary to run tests with
+ZSH?="`which zsh`" # zsh binary to run tests with
 
 all:
 	cd docs && \
diff --git a/tests/test-highlighting.zsh b/tests/test-highlighting.zsh
index 8b564a8..d45cfae 100755
--- a/tests/test-highlighting.zsh
+++ b/tests/test-highlighting.zsh
@@ -29,6 +29,7 @@
 # -------------------------------------------------------------------------------------------------
 
 
+export PATH
 setopt NO_UNSET WARN_CREATE_GLOBAL
 
 # Required for add-zle-hook-widget.