diff --git a/.github/workflows/regex.yml b/.github/workflows/regex.yml
index 3e06179..ed0654d 100644
--- a/.github/workflows/regex.yml
+++ b/.github/workflows/regex.yml
@@ -1,4 +1,4 @@
-name: Validate Regex Patterns
+name: Regular Expressions
 
 on:
   push:
@@ -26,6 +26,4 @@ jobs:
         run: pwsh scripts/validateAllPatterns.ps1
 
       - name: test
-        run: |
-          echo "TODO: Implement unit tests for all patterns"
-          # TODO: Add test runner command here
+        run: pwsh scripts/testPatterns.ps1
diff --git a/scripts/testPatterns.ps1 b/scripts/testPatterns.ps1
new file mode 100644
index 0000000..3a290b3
--- /dev/null
+++ b/scripts/testPatterns.ps1
@@ -0,0 +1,183 @@
+param(
+    [string]$YamlFilePath
+)
+
+# Function to run tests for a single file
+function Test-Pattern {
+    param([string]$FilePath)
+    
+    $fileName = (Get-Item $FilePath).BaseName
+    
+    try {
+        # Read YAML content
+        $yamlContent = Get-Content -Path $FilePath -Raw
+        
+        # Extract pattern
+        $patternMatch = [regex]::Match($yamlContent, 'pattern:\s*(.+)')
+        $pattern = $patternMatch.Groups[1].Value.Trim()
+        
+        # Create regex object with case-insensitive and multiline options
+        $regexOptions = [System.Text.RegularExpressions.RegexOptions]::IgnoreCase -bor [System.Text.RegularExpressions.RegexOptions]::Multiline
+        $regex = New-Object System.Text.RegularExpressions.Regex($pattern, $regexOptions)
+        
+        # Extract tests
+        $testsSection = [regex]::Match($yamlContent, '(?s)tests:(.*?)(?:\n\w|\z)').Groups[1].Value
+        
+        if ([string]::IsNullOrWhiteSpace($testsSection)) {
+            return @{
+                File = $fileName
+                Passed = 0
+                Failed = 0
+                Total = 0
+            }
+        }
+        
+        # Parse each test
+        $tests = [regex]::Matches($testsSection, '(?s)- expected:\s*(true|false).*?input:\s*(.+?)(?=\n\s*\w|\n-|\z)')
+        
+        $passed = 0
+        $failed = 0
+        $failureDetails = @()
+        
+        foreach ($test in $tests) {
+            $expected = $test.Groups[1].Value -eq 'true'
+            $input = $test.Groups[2].Value.Trim()
+            
+            # Run the test
+            $matches = $regex.IsMatch($input)
+            
+            if ($matches -eq $expected) {
+                $passed++
+            }
+            else {
+                $failed++
+                $failureDetails += "    Input: '$input' - Expected: $expected, Got: $matches"
+            }
+        }
+        
+        return @{
+            File = $fileName
+            Passed = $passed
+            Failed = $failed
+            Total = $tests.Count
+            Failures = $failureDetails
+        }
+    }
+    catch {
+        return @{
+            File = $fileName
+            Error = $_.Exception.Message
+        }
+    }
+}
+
+# Main execution
+if ($YamlFilePath) {
+    # Test single file
+    $result = Test-Pattern -FilePath $YamlFilePath
+    
+    if ($result.Error) {
+        Write-Host "ERROR: $($result.File): $($result.Error)" -ForegroundColor Red
+        exit 1
+    }
+    
+    if ($result.Failed -gt 0) {
+        Write-Host "$($result.File): $($result.Failed)/$($result.Total) tests failed" -ForegroundColor Red
+        foreach ($failure in $result.Failures) {
+            Write-Host $failure
+        }
+        exit 1
+    }
+    else {
+        Write-Host "$($result.File): All $($result.Total) tests passed"
+        exit 0
+    }
+}
+else {
+    # Test all files
+    $patternFiles = @()
+    $patternFiles += Get-ChildItem -Path "regex_patterns" -Filter "*.yml" -File
+    $patternFiles += Get-ChildItem -Path "regex_patterns" -Filter "*.yaml" -File
+    
+    if ($patternFiles.Count -eq 0) {
+        Write-Host "No pattern files found"
+        exit 1
+    }
+    
+    $results = @()
+    $totalFiles = $patternFiles.Count
+    $filesWithFailures = @()
+    
+    foreach ($file in $patternFiles) {
+        $result = Test-Pattern -FilePath $file.FullName
+        $results += $result
+        
+        if ($result.Error) {
+            $filesWithFailures += $result
+        }
+        elseif ($result.Failed -gt 0) {
+            $filesWithFailures += $result
+        }
+    }
+    
+    # Report failures
+    if ($filesWithFailures.Count -gt 0) {
+        Write-Host "ERRORS:"
+        
+        # Find global max input length across all failures
+        $globalMaxInputLength = 0
+        foreach ($failure in $filesWithFailures) {
+            if (-not $failure.Error) {
+                foreach ($detail in $failure.Failures) {
+                    if ($detail -match "Input: '(.+?)' -") {
+                        $inputLength = $matches[1].Length
+                        if ($inputLength -gt $globalMaxInputLength) {
+                            $globalMaxInputLength = $inputLength
+                        }
+                    }
+                }
+            }
+        }
+        
+        # Limit padding to 150 characters
+        if ($globalMaxInputLength -gt 150) {
+            $globalMaxInputLength = 150
+        }
+        
+        foreach ($failure in $filesWithFailures) {
+            Write-Host "  $($failure.File):"
+            
+            if ($failure.Error) {
+                # Extract cleaner error message
+                $errorMsg = $failure.Error
+                if ($errorMsg -match "at offset (\d+)\. (.+?)\.?`"") {
+                    $errorMsg = "offset $($matches[1]): $($matches[2])"
+                }
+                Write-Host "    $errorMsg"
+            }
+            else {
+                foreach ($detail in $failure.Failures) {
+                    if ($detail -match "Input: '(.+?)' - Expected: (\w+), Got: (\w+)") {
+                        $input = $matches[1]
+                        $expected = $matches[2]
+                        $got = $matches[3]
+                        
+                        # Truncate only if longer than 150
+                        if ($input.Length -gt 150) {
+                            $input = $input.Substring(0, 147) + "..."
+                        }
+                        
+                        $paddedInput = $input.PadRight($globalMaxInputLength)
+                        Write-Host "    $paddedInput | Expected: $expected | Got: $got"
+                    }
+                }
+            }
+        }
+        
+        exit 1
+    }
+    else {
+        Write-Host "All tests passed"
+        exit 0
+    }
+}
\ No newline at end of file
diff --git a/scripts/unitTest.ps1 b/scripts/unitTest.ps1
deleted file mode 100644
index 11c112d..0000000
--- a/scripts/unitTest.ps1
+++ /dev/null
@@ -1 +0,0 @@
-# TODO: Run a single unit test given a regular expression and unit test. A unit test includes the input string and whether it should match or not.
\ No newline at end of file
diff --git a/scripts/validatePattern.ps1 b/scripts/validatePattern.ps1
deleted file mode 100644
index f4d1d5a..0000000
--- a/scripts/validatePattern.ps1
+++ /dev/null
@@ -1,73 +0,0 @@
-param(
-    [Parameter(Mandatory=$true)]
-    [string]$YamlFilePath
-)
-
-$moduleName = "regex"
-
-function Write-Log {
-    param(
-        [Parameter(Mandatory=$true)]
-        [string]$Level,
-        [Parameter(Mandatory=$true)]
-        [string]$Message
-    )
-    
-    $timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
-    $levelPadded = $Level.ToUpper().PadRight(7)
-    $modulePadded = $moduleName.PadRight(0)
-    
-    # Write colored level
-    Write-Host -NoNewline "["
-    if ($Level -eq "ERROR") {
-        Write-Host -NoNewline $levelPadded -ForegroundColor Red
-    }
-    elseif ($Level -eq "SUCCESS") {
-        Write-Host -NoNewline $levelPadded -ForegroundColor Green
-    }
-    elseif ($Level -eq "INFO") {
-        Write-Host -NoNewline $levelPadded -ForegroundColor Cyan
-    }
-    else {
-        Write-Host -NoNewline $levelPadded
-    }
-    Write-Host -NoNewline "] "
-    
-    # Write grey timestamp
-    Write-Host -NoNewline "[$timestamp] " -ForegroundColor DarkGray
-    
-    # Write module and message in normal color
-    Write-Host "[$modulePadded] $Message"
-}
-
-try {
-    # Check if file exists
-    if (-not (Test-Path $YamlFilePath)) {
-        Write-Log -Level "ERROR" -Message "YAML file not found: $YamlFilePath"
-        exit 1
-    }
-
-    # Read YAML content
-    $yamlContent = Get-Content -Path $YamlFilePath -Raw
-
-    # Extract pattern field from YAML
-    $patternMatch = [regex]::Match($yamlContent, 'pattern:\s*(.+)')
-    $pattern = $patternMatch.Groups[1].Value.Trim()
-    
-    Write-Log -Level "INFO" -Message "Found pattern: $pattern"
-    
-    # Validate the pattern against .NET regex engine
-    try {
-        $regex = New-Object System.Text.RegularExpressions.Regex($pattern)
-        Write-Log -Level "SUCCESS" -Message "Valid regex pattern"
-        exit 0
-    }
-    catch {
-        Write-Log -Level "ERROR" -Message "Pattern validation failed: $_"
-        exit 1
-    }
-}
-catch {
-    Write-Log -Level "ERROR" -Message "Script execution failed: $_"
-    exit 1
-}
\ No newline at end of file
diff --git a/scripts/validateAllPatterns.ps1 b/scripts/validatePatterns.ps1
similarity index 100%
rename from scripts/validateAllPatterns.ps1
rename to scripts/validatePatterns.ps1