diff --git a/.env b/.env
deleted file mode 100644
index 4c2fd6e..0000000
--- a/.env
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/bash
-
-if lsvirtualenv | grep -qm1 '^antigen$'; then
-    workon antigen
-else
-    mkvirtualenv antigen
-    pip install -r requirements.txt
-fi
diff --git a/Makefile b/Makefile
index bed40b1..13ac11a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,9 @@
 .PHONY: itests tests
 
+TESTS ?= tests
+
 itests:
-	ZDOTDIR="${PWD}/tests" cram -i --shell=zsh tests
+	${MAKE} tests CRAM_OPTS=-i
 
 tests:
-	ZDOTDIR="${PWD}/tests" cram --shell=zsh tests
+	. .pyenv/bin/activate && ZDOTDIR="${PWD}/tests" cram ${CRAM_OPTS} --shell=zsh ${TESTS}