diff --git a/release.nix b/release.nix
index a7016b7..a6d21e6 100644
--- a/release.nix
+++ b/release.nix
@@ -108,8 +108,7 @@ let
     tests.services-synergy = makeTest ./tests/services-synergy.nix;
     tests.services-privoxy = makeTest ./tests/services-privoxy.nix;
     tests.system-defaults-write = makeTest ./tests/system-defaults-write.nix;
-    tests.system-environment-bash = makeTest ./tests/system-environment-bash.nix;
-    tests.system-environment-fish = makeTest ./tests/system-environment-fish.nix;
+    tests.system-environment = makeTest ./tests/system-environment.nix;
     tests.system-keyboard-mapping = makeTest ./tests/system-keyboard-mapping.nix;
     tests.system-packages = makeTest ./tests/system-packages.nix;
     tests.system-path = makeTest ./tests/system-path.nix;
diff --git a/tests/system-environment-bash.nix b/tests/system-environment-bash.nix
deleted file mode 100644
index 158bdbf..0000000
--- a/tests/system-environment-bash.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-   programs.bash.enable = true;
-
-   test = ''
-     echo checking setEnvironment in /etc/bashrc >&2
-     fgrep '. ${config.system.build.setEnvironment}' ${config.out}/etc/bashrc
-   '';
-}
diff --git a/tests/system-environment-fish.nix b/tests/system-environment-fish.nix
deleted file mode 100644
index e1873b3..0000000
--- a/tests/system-environment-fish.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-   programs.fish.enable = true;
-
-   test = ''
-     echo checking setEnvironment in /etc/fish/config.fish >&2
-     grep 'fenv source ${config.system.build.setEnvironment}' ${config.out}/etc/fish/nixos-env-preinit.fish
-   '';
-}
diff --git a/tests/system-environment.nix b/tests/system-environment.nix
new file mode 100644
index 0000000..7ed13b1
--- /dev/null
+++ b/tests/system-environment.nix
@@ -0,0 +1,18 @@
+{ config, pkgs, ... }:
+
+{
+   programs.bash.enable = true;
+   programs.fish.enable = true;
+   programs.zsh.enable = true;
+
+   test = ''
+     echo checking setEnvironment in /etc/bashrc >&2
+     fgrep '. ${config.system.build.setEnvironment}' ${config.out}/etc/bashrc
+
+     echo checking setEnvironment in /etc/fish/nixos-env-preinit.fish >&2
+     grep 'fenv source ${config.system.build.setEnvironment}' ${config.out}/etc/fish/nixos-env-preinit.fish
+
+     echo checking setEnvironment in /etc/zshenv >&2
+     fgrep '. ${config.system.build.setEnvironment}' ${config.out}/etc/zshenv
+   '';
+}