diff --git a/test/sandbox/case/default.nix b/test/sandbox/case/default.nix
index acf30d7..96a12a6 100644
--- a/test/sandbox/case/default.nix
+++ b/test/sandbox/case/default.nix
@@ -64,6 +64,18 @@ let
         "-s"
         tc.expectedFilter.${system}
       ];
+
+      extraPaths =
+        if tc.useCommonPaths then
+          [ ]
+        else
+          [
+            {
+              type = "bind";
+              src = "/var/tmp";
+              write = true;
+            }
+          ];
     };
 
   testCaseName = name: "cat.gensokyo.hakurei.test." + name;
diff --git a/test/sandbox/case/device.nix b/test/sandbox/case/device.nix
index 7fc56da..a8aba8b 100644
--- a/test/sandbox/case/device.nix
+++ b/test/sandbox/case/device.nix
@@ -169,6 +169,7 @@ in
       } null;
       usr = fs "800001c0" { bin = fs "800001ed" { env = fs "80001ff" null null; } null; } null;
       var = fs "800001c0" {
+        tmp = fs "801001ff" null null;
         lib = fs "800001c0" {
           hakurei = fs "800001c0" {
             u0 = fs "800001c0" {
@@ -226,6 +227,7 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,userxattr")
diff --git a/test/sandbox/case/mapuid.nix b/test/sandbox/case/mapuid.nix
index fc46466..1c39fc1 100644
--- a/test/sandbox/case/mapuid.nix
+++ b/test/sandbox/case/mapuid.nix
@@ -192,6 +192,7 @@ in
       tmp = fs "800001f8" { } null;
       usr = fs "800001c0" { bin = fs "800001ed" { env = fs "80001ff" null null; } null; } null;
       var = fs "800001c0" {
+        tmp = fs "801001ff" null null;
         lib = fs "800001c0" {
           hakurei = fs "800001c0" {
             u0 = fs "800001c0" {
@@ -253,6 +254,7 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,userxattr")
diff --git a/test/sandbox/case/pdlike.nix b/test/sandbox/case/pdlike.nix
index 1d8ac0e..9233a11 100644
--- a/test/sandbox/case/pdlike.nix
+++ b/test/sandbox/case/pdlike.nix
@@ -190,6 +190,7 @@ in
       tmp = fs "800001f8" { } null;
       usr = fs "800001c0" { bin = fs "800001ed" { env = fs "80001ff" null null; } null; } null;
       var = fs "800001c0" {
+        tmp = fs "801001ff" null null;
         lib = fs "800001c0" {
           hakurei = fs "800001c0" {
             u0 = fs "800001c0" {
@@ -251,6 +252,7 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/var/lib/hakurei/u0/a5" "/var/lib/hakurei/u0/a5" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=4k,mode=755,uid=1000005,gid=1000005")
diff --git a/test/sandbox/case/preset.nix b/test/sandbox/case/preset.nix
index 61d0bbc..46cab69 100644
--- a/test/sandbox/case/preset.nix
+++ b/test/sandbox/case/preset.nix
@@ -189,6 +189,7 @@ in
       tmp = fs "800001f8" { } null;
       usr = fs "800001c0" { bin = fs "800001ed" { env = fs "80001ff" null null; } null; } null;
       var = fs "800001c0" {
+        tmp = fs "801001ff" null null;
         lib = fs "800001c0" {
           hakurei = fs "800001c0" {
             u0 = fs "800001c0" {
@@ -249,6 +250,7 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/var/lib/hakurei/u0/a1" "/var/lib/hakurei/u0/a1" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=4k,mode=755,uid=1000001,gid=1000001")
diff --git a/test/sandbox/case/tty.nix b/test/sandbox/case/tty.nix
index 197cc2e..93b057c 100644
--- a/test/sandbox/case/tty.nix
+++ b/test/sandbox/case/tty.nix
@@ -196,6 +196,7 @@ in
       } null;
       usr = fs "800001c0" { bin = fs "800001ed" { env = fs "80001ff" null null; } null; } null;
       var = fs "800001c0" {
+        tmp = fs "801001ff" null null;
         lib = fs "800001c0" {
           hakurei = fs "800001c0" {
             u0 = fs "800001c0" {
@@ -258,6 +259,7 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,uuid=on,userxattr")
diff --git a/test/sandbox/configuration.nix b/test/sandbox/configuration.nix
index 977d854..8406553 100644
--- a/test/sandbox/configuration.nix
+++ b/test/sandbox/configuration.nix
@@ -77,6 +77,11 @@ in
     };
 
     commonPaths = [
+      {
+        type = "bind";
+        src = "/var/tmp";
+        write = true;
+      }
       {
         type = "bind";
         src = "/var/cache";