diff --git a/Test-ObsidianInstallation.ps1 b/Test-ObsidianInstallation.ps1
new file mode 100644
index 0000000..933d5bb
--- /dev/null
+++ b/Test-ObsidianInstallation.ps1
@@ -0,0 +1,62 @@
+# Test-ObsidianInstallation.ps1
+
+function Test-AdminPrivilege {
+    if (-Not (Test-Administrator)) {
+        Write-Output "Running as non-admin user for testing admin check..."
+    } else {
+        Write-Output "Running as admin user for testing admin check..."
+    }
+}
+
+function Test-ChocolateyInstallation {
+    Write-Output "Simulating environment without Chocolatey..."
+    Remove-Item -Path "C:\ProgramData\chocolatey" -Recurse -Force -ErrorAction SilentlyContinue
+
+    if (-Not (Get-Command choco -ErrorAction SilentlyContinue)) {
+        Write-Output "Chocolatey is not installed. Proceeding with installation..."
+    } else {
+        Write-Output "Chocolatey is already installed."
+    }
+}
+
+function Test-ObsidianDownload {
+    Write-Output "Simulating download failure..."
+    Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings" -Name "ProxyEnable" -Value 1
+    Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings" -Name "ProxyServer" -Value "127.0.0.1:8080"
+    Start-Sleep -Seconds 5
+
+    Write-Output "Downloading Obsidian installer..."
+    wget https://github.com/obsidianmd/obsidian-releases/releases/download/v1.6.3/Obsidian.1.6.3.exe -OutFile ObsidianInstaller.exe
+
+    if (Test-Path "ObsidianInstaller.exe") {
+        Write-Output "Download succeeded unexpectedly."
+    } else {
+        Write-Output "Download failed as expected."
+    }
+
+    # Clean up proxy settings
+    Set-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings" -Name "ProxyEnable" -Value 0
+}
+
+# Simulate invalid plugins.json file
+Set-Content -Path "invalid_plugins.json" -Value @"
+{
+  "core_plugins": ["plugin1", "plugin2"]
+  "community_plugins": ["plugin3", "plugin4"]
+}
+"@
+
+function Test-InvalidPluginConfig {
+    Write-Output "Testing with invalid plugins.json..."
+    try {
+        $pluginsConfig = Get-Content -Raw -Path "invalid_plugins.json" | ConvertFrom-Json
+    } catch {
+        Write-Output "Caught error parsing invalid plugins.json as expected: $_"
+    }
+}
+
+# Run tests
+Test-AdminPrivilege
+Test-ChocolateyInstallation
+Test-ObsidianDownload
+Test-InvalidPluginConfig
diff --git a/Test-ObsidianInstallation.sh b/Test-ObsidianInstallation.sh
new file mode 100644
index 0000000..39e3e39
--- /dev/null
+++ b/Test-ObsidianInstallation.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+function test_os_selection {
+    echo "Testing OS selection..."
+    echo "L" | ./install_obsidian.sh
+    echo "M" | ./install_obsidian.sh
+    echo "W" | ./install_obsidian.sh
+}
+
+function test_dependencies_installation {
+    echo "Simulating environment without wget and jq..."
+    sudo apt remove -y wget jq
+
+    echo "Installing dependencies..."
+    sudo apt update
+    sudo apt install -y wget jq
+
+    if ! command -v wget &> /dev/null || ! command -v jq &> /dev/null; then
+        echo "Failed to install dependencies."
+    else
+        echo "Dependencies installed successfully."
+    fi
+}
+
+function test_obsidian_download_failure {
+    echo "Simulating download failure..."
+    sudo iptables -A OUTPUT -p tcp --dport 443 -j REJECT
+
+    echo "Downloading Obsidian..."
+    wget https://github.com/obsidianmd/obsidian-releases/releases/download/v1.6.3/Obsidian-1.6.3.AppImage -O obsidian.AppImage
+    if [ ! -f obsidian.AppImage ]; then
+        echo "Download failed as expected."
+    else
+        echo "Download succeeded unexpectedly."
+    fi
+
+    # Clean up iptables rule
+    sudo iptables -D OUTPUT -p tcp --dport 443 -j REJECT
+}
+
+# Create an invalid plugins.json file
+echo '{
+  "core_plugins": ["plugin1", "plugin2"]
+  "community_plugins": ["plugin3", "plugin4"]
+' > invalid_plugins.json
+
+function test_invalid_plugins_config {
+    echo "Testing with invalid plugins.json..."
+    if jq . invalid_plugins.json; then
+        echo "Invalid plugins.json parsed unexpectedly."
+    else
+        echo "Caught error parsing invalid plugins.json as expected."
+    fi
+}
+
+# Run tests
+test_os_selection
+test_dependencies_installation
+test_obsidian_download_failure
+test_invalid_plugins_config
diff --git a/install_obsidian.ps1 b/install_obsidian.ps1
index 39e2894..fdd5d59 100644
--- a/install_obsidian.ps1
+++ b/install_obsidian.ps1
@@ -11,7 +11,8 @@ function Install-Obsidian-Windows {
         Write-Output "Chocolatey is not installed. Installing Chocolatey..."
         Set-ExecutionPolicy Bypass -Scope Process -Force;
         [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;
-        iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'));
+        $script = (New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1')
+        Invoke-Command -ScriptBlock ([ScriptBlock]::Create($script))
     }
     choco install -y wget jq
 
@@ -36,7 +37,7 @@ function Install-Obsidian-Windows {
     }
 }
 
-function Install-Plugins {
+function Install-Plugin {
     Write-Output "Installing plugins..."
 
     # Kill Obsidian process if running
@@ -79,4 +80,4 @@ if (-Not (Test-Administrator)) {
 
 # Directly run Windows installation and plugin configuration
 Install-Obsidian-Windows
-Install-Plugins
+Install-Plugin