diff --git a/test/package/default.nix b/test/package/default.nix
index 5a45b14..a0305ea 100644
--- a/test/package/default.nix
+++ b/test/package/default.nix
@@ -1,5 +1,6 @@
 { system, inputs, self, pkgs }:
-  (import ./migrator { inherit system inputs self pkgs; }) //
-  (import ./hemar    { inherit system inputs self pkgs; }) //
+  (import ./migrator      { inherit system inputs self pkgs; }) //
+  (import ./hemar         { inherit system inputs self pkgs; }) //
   (import (./. + "/sentinèlla") { inherit system inputs self pkgs; }) //
-  (import ./db-tool  { inherit system inputs self pkgs; })
+  (import ./db-tool       { inherit system inputs self pkgs; }) //
+  (import ./linux-devshell { inherit system inputs self pkgs; })
diff --git a/test/package/linux-devshell/default.nix b/test/package/linux-devshell/default.nix
new file mode 100644
index 0000000..79553d0
--- /dev/null
+++ b/test/package/linux-devshell/default.nix
@@ -0,0 +1,140 @@
+{ inputs, self, pkgs, system, ... }: let
+  lib = inputs.nixpkgs.lib;
+
+  mkTestDrv = name: type:
+    if type == "directory" then
+      pkgs.runCommand "test-${name}" {} ''
+        if ! [ -f ${./test + "/${name}" + /run.sh} ]; then
+          echo "no run.sh in test/${name}"
+          exit 1
+        fi
+        mkdir -p "$out"
+        cp -r ${./test + "/${name}"}/* "$out/"
+        chmod +x "$out/run.sh"
+      ''
+    else if lib.hasSuffix ".sh" name then
+      pkgs.runCommand "test-${lib.removeSuffix ".sh" name}" {} ''
+        mkdir -p "$out"
+        install -Dm755 ${./test + "/${name}"} "$out/run.sh"
+      ''
+    else
+      null;
+
+  testDir  = builtins.readDir ./test;
+  testDrvs =
+    lib.mapAttrs' (n: v:
+      lib.nameValuePair (lib.removeSuffix ".sh" n) v
+    ) (lib.filterAttrs (_: v: v != null)
+      (lib.mapAttrs (n: t: mkTestDrv n t) testDir));
+
+  linuxDevShell = self.packages.${system}.linux-devshell;
+  linuxDevShellStandalone = self.packages.${system}.linux-devshell-standalone;
+
+  archBootstrap = pkgs.fetchurl {
+    url = "https://geo.mirror.pkgbuild.com/iso/latest/archlinux-bootstrap-x86_64.tar.zst";
+    hash = "sha256-1YnwGo2li1yIzm6W6yYYwuZeY16Ddsrz1LRTY6/A3Ww=";
+  };
+
+  mkTest = testName: testDrv: pkgs.runCommand "linux-devshell-test-${testName}"
+    {
+      nativeBuildInputs = [ pkgs.coreutils pkgs.gnugrep pkgs.gnused ];
+      buildInputs       = [ pkgs.dash ];
+      linuxDevShell = linuxDevShell;
+      linuxDevShellStandalone = linuxDevShellStandalone;
+    } ''
+      ${builtins.readFile self.legacyPackages.${system}.helpers.posix-shell.log}
+      export HECTIC_LOG=trace
+      test=${testDrv}
+      linuxDevShell="${linuxDevShell}"
+      linuxDevShellStandalone="${linuxDevShellStandalone}"
+      ${builtins.readFile ./launch.sh}
+
+      mkdir -p "$out"
+    '';
+
+  archTest = pkgs.runCommand "linux-devshell-test-arch-integration"
+    {
+      nativeBuildInputs = [ pkgs.coreutils pkgs.gnugrep pkgs.gnused pkgs.zstd pkgs.git ];
+      buildInputs       = [ pkgs.dash pkgs.proot ];
+      linuxDevShellStandalone = linuxDevShellStandalone;
+      archBootstrap = archBootstrap;
+    } ''
+      ${builtins.readFile self.legacyPackages.${system}.helpers.posix-shell.log}
+      export HECTIC_LOG=trace
+
+      log notice "test case: ''${WHITE}arch integration"
+
+      ARCH_DIR="$(mktemp -d)"
+      trap 'rm -rf "$ARCH_DIR"' EXIT
+
+      log info "Extracting Arch bootstrap..."
+      tar --zstd -xf "${archBootstrap}" -C "$ARCH_DIR" --strip-components=1 \
+        --no-same-permissions --no-same-owner --warning=no-unknown-keyword \
+        --exclude='etc/ca-certificates' --exclude='etc/ssl' || true
+
+      log info "Preparing Arch environment..."
+      mkdir -p "$ARCH_DIR/root/test-repo/script"
+      cp "${linuxDevShellStandalone}" "$ARCH_DIR/root/test-repo/script/linux-devshell"
+      chmod +x "$ARCH_DIR/root/test-repo/script/linux-devshell"
+
+      cat > "$ARCH_DIR/root/test-repo/flake.nix" <<'EOF'
+      {
+        description = "Test flake for linux-devshell";
+        inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+        outputs = { self, nixpkgs }: {
+          devShells.x86_64-linux.default = nixpkgs.legacyPackages.x86_64-linux.mkShell {
+            shellHook = ''''
+              echo "=== Inside dev shell ==="
+              exit 0
+            '''';
+          };
+        };
+      }
+      EOF
+
+      mkdir -p "$ARCH_DIR/root/test-repo/.git"
+      git init "$ARCH_DIR/root/test-repo"
+      git -C "$ARCH_DIR/root/test-repo" config user.email "test@example.com"
+      git -C "$ARCH_DIR/root/test-repo" config user.name "Test"
+      git -C "$ARCH_DIR/root/test-repo" add .
+      git -C "$ARCH_DIR/root/test-repo" commit -m "init"
+
+      log info "Running linux-devshell in Arch via proot..."
+      proot -b /dev -r "$ARCH_DIR" -w /root/test-repo /bin/sh -c '
+        export PATH="/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
+        export TMPDIR=/tmp
+        mkdir -p /nix /build /tmp
+        /root/test-repo/script/linux-devshell 2>&1
+      ' | tee /tmp/proot-output || true
+
+      log info "Checking script behavior in Arch environment..."
+
+      if ! grep -q "Nix not found" /tmp/proot-output; then
+        log error "Script did not detect missing Nix"
+        cat /tmp/proot-output
+        exit 1
+      fi
+      log success "Script correctly detects missing Nix"
+
+      if ! grep -q "Installing via nixos.org" /tmp/proot-output; then
+        log error "Script did not attempt Nix installation"
+        cat /tmp/proot-output
+        exit 1
+      fi
+      log success "Script attempts Nix installation"
+
+      if ! grep -q "Failed to download Nix installer" /tmp/proot-output; then
+        log error "Script did not handle download failure (no network in sandbox)"
+        cat /tmp/proot-output
+        exit 1
+      fi
+      log success "Script handles network failure gracefully"
+
+      log success "Script runs correctly in Arch Linux environment"
+
+      mkdir -p "$out"
+    '';
+in
+  (lib.mapAttrs (name: drv: mkTest name drv) testDrvs) // {
+    arch-integration = archTest;
+  }
diff --git a/test/package/linux-devshell/launch.sh b/test/package/linux-devshell/launch.sh
new file mode 100644
index 0000000..a3ec8cc
--- /dev/null
+++ b/test/package/linux-devshell/launch.sh
@@ -0,0 +1,3 @@
+set -eu
+
+. "$test/run.sh"
diff --git a/test/package/linux-devshell/test/standalone-structure.sh b/test/package/linux-devshell/test/standalone-structure.sh
new file mode 100644
index 0000000..7032e46
--- /dev/null
+++ b/test/package/linux-devshell/test/standalone-structure.sh
@@ -0,0 +1,49 @@
+#!/bin/dash
+set -eu
+
+log notice "test case: ${WHITE}syntax check"
+
+log info "Checking standard package binary exists..."
+[ -x "${linuxDevShell}/bin/linux-devshell" ] || {
+  log error "linux-devshell binary not found or not executable"
+  exit 1
+}
+log success "Standard package binary exists"
+
+log info "Checking standalone script exists..."
+[ -x "${linuxDevShellStandalone}" ] || {
+  log error "linux-devshell-standalone script not found or not executable"
+  exit 1
+}
+log success "Standalone script exists"
+
+log info "Checking standalone script has portable shebang..."
+head -1 "${linuxDevShellStandalone}" | grep -q '^#!/bin/sh$' || {
+  log error "Standalone script does not have #!/bin/sh shebang"
+  exit 1
+}
+log success "Standalone script has portable shebang"
+
+log info "Checking standalone script contains log helpers..."
+grep -q 'log_info()' "${linuxDevShellStandalone}" || {
+  log error "Standalone script missing log_info helper"
+  exit 1
+}
+grep -q 'log_error()' "${linuxDevShellStandalone}" || {
+  log error "Standalone script missing log_error helper"
+  exit 1
+}
+log success "Standalone script contains log helpers"
+
+log info "Checking standalone script contains main logic..."
+grep -q 'detect_shell()' "${linuxDevShellStandalone}" || {
+  log error "Standalone script missing detect_shell function"
+  exit 1
+}
+grep -q 'install_nix()' "${linuxDevShellStandalone}" || {
+  log error "Standalone script missing install_nix function"
+  exit 1
+}
+log success "Standalone script contains main logic"
+
+log notice "test passed"
diff --git a/test/package/linux-devshell/test/syntax-check.sh b/test/package/linux-devshell/test/syntax-check.sh
new file mode 100644
index 0000000..ab29405
--- /dev/null
+++ b/test/package/linux-devshell/test/syntax-check.sh
@@ -0,0 +1,27 @@
+#!/bin/dash
+set -eu
+
+log notice "test case: ${WHITE}syntax check"
+
+log info "Checking standard package script syntax..."
+dash -n "${linuxDevShell}/bin/linux-devshell" || {
+  log error "Standard package script has syntax errors"
+  exit 1
+}
+log success "Standard package script syntax is valid"
+
+log info "Checking standalone script syntax..."
+dash -n "${linuxDevShellStandalone}" || {
+  log error "Standalone script has syntax errors"
+  exit 1
+}
+log success "Standalone script syntax is valid"
+
+log info "Checking script contains Nix detection logic..."
+grep -q 'command -v nix' "${linuxDevShellStandalone}" || {
+  log error "Standalone script missing Nix detection"
+  exit 1
+}
+log success "Script contains Nix detection logic"
+
+log notice "test passed"