diff --git a/src/ALCops.Mcp/Services/CodeFixRunner.cs b/src/ALCops.Mcp/Services/CodeFixRunner.cs
index 9a642c6..fb76742 100644
--- a/src/ALCops.Mcp/Services/CodeFixRunner.cs
+++ b/src/ALCops.Mcp/Services/CodeFixRunner.cs
@@ -173,11 +173,16 @@ public async Task<IReadOnlyList<CodeFixInfo>> GetFixesAsync(
         var compilationWithAnalyzers = new CompilationWithAnalyzers(
             compilation, analyzers, null!, ct);
 
-        var allDiagnostics = await compilationWithAnalyzers.GetAnalyzerDiagnosticsAsync();
+        var rawDiagnostics = await compilationWithAnalyzers.GetAnalyzerDiagnosticsAsync();
+
+        // Apply pragma suppression filtering (same as DiagnosticsRunner)
+        var effectiveDiagnostics = CompilationWithAnalyzers
+            .GetEffectiveDiagnostics(rawDiagnostics, compilation);
 
         // Filter to the target file and diagnostic ID
         var documentPath = document.FilePath ?? "";
-        var diagnostics = allDiagnostics
+        var diagnostics = effectiveDiagnostics
+            .Where(d => !d.IsSuppressed)
             .Where(d => d.Id == diagnosticId
                 && d.Location.SourceTree?.FilePath is string fp
                 && Path.GetFullPath(fp).Equals(Path.GetFullPath(documentPath), StringComparison.OrdinalIgnoreCase))
diff --git a/src/ALCops.Mcp/Services/DiagnosticsRunner.cs b/src/ALCops.Mcp/Services/DiagnosticsRunner.cs
index f6713f4..49ae871 100644
--- a/src/ALCops.Mcp/Services/DiagnosticsRunner.cs
+++ b/src/ALCops.Mcp/Services/DiagnosticsRunner.cs
@@ -45,15 +45,23 @@ public async Task<IReadOnlyList<DiagnosticResult>> RunAsync(
         var compilationWithAnalyzers = new CompilationWithAnalyzers(
             compilation, analyzers, null!, ct);
 
-        var allDiagnostics = await compilationWithAnalyzers.GetAnalyzerDiagnosticsAsync();
+        var rawDiagnostics = await compilationWithAnalyzers.GetAnalyzerDiagnosticsAsync();
+
+        // GetAnalyzerDiagnosticsAsync returns raw diagnostics without pragma suppression.
+        // Apply CompilationOptions filtering to honor #pragma warning disable/restore.
+        var effectiveDiagnostics = CompilationWithAnalyzers
+            .GetEffectiveDiagnostics(rawDiagnostics, compilation);
 
         // Apply filters
         var results = new List<DiagnosticResult>();
-        foreach (var diagnostic in allDiagnostics)
+        foreach (var diagnostic in effectiveDiagnostics)
         {
             if (ct.IsCancellationRequested)
                 break;
 
+            if (diagnostic.IsSuppressed)
+                continue;
+
             // Ruleset filter: suppress diagnostics set to None, override severity for others
             var effectiveSeverity = diagnostic.Severity;
             if (provider is AnalyzerSet analyzerSet && analyzerSet.RuleActions is { } ruleActions)
diff --git a/tests/ALCops.Mcp.Tests/DiagnosticsRunnerTests.cs b/tests/ALCops.Mcp.Tests/DiagnosticsRunnerTests.cs
new file mode 100644
index 0000000..432c720
--- /dev/null
+++ b/tests/ALCops.Mcp.Tests/DiagnosticsRunnerTests.cs
@@ -0,0 +1,50 @@
+using ALCops.Mcp.Services;
+using Xunit;
+
+namespace ALCops.Mcp.Tests;
+
+public class DiagnosticsRunnerTests
+{
+    private static string GetFixturePath(string name)
+    {
+        var path = Path.Combine(AppContext.BaseDirectory, "Fixtures", name);
+        if (!Directory.Exists(path))
+            throw new DirectoryNotFoundException(
+                $"Test fixture '{name}' not found at {path}. Ensure fixtures are copied to output.");
+        return path;
+    }
+
+    private static ProjectLoader CreateLoader()
+    {
+        var locator = new DevToolsLocator();
+        return new ProjectLoader(locator);
+    }
+
+    [Fact]
+    public async Task RunAsync_PragmaSuppressedDiagnostics_AreNotReported()
+    {
+        var loader = CreateLoader();
+        var projectPath = GetFixturePath("PragmaProject");
+        var session = await loader.LoadProjectAsync(projectPath);
+        var registry = new AnalyzerRegistry();
+        var runner = new DiagnosticsRunner(registry);
+
+        var withoutPragmaPath = Path.Combine(projectPath, "WithoutPragma.al");
+        var withPragmaPath = Path.Combine(projectPath, "WithPragma.al");
+
+        var withoutPragmaResults = await runner.RunAsync(session, filePath: withoutPragmaPath);
+        var withPragmaResults = await runner.RunAsync(session, filePath: withPragmaPath);
+
+        // The unsuppressed file must produce diagnostics for the test to be meaningful.
+        Assert.True(withoutPragmaResults.Count > 0,
+            "No diagnostics produced for the unsuppressed file — " +
+            "built-in analyzers may not be loaded in this environment.");
+
+        Assert.True(
+            withPragmaResults.Count < withoutPragmaResults.Count,
+            $"Expected pragma-suppressed file to produce fewer diagnostics " +
+            $"({withPragmaResults.Count}) than unsuppressed file ({withoutPragmaResults.Count}). " +
+            $"Unsuppressed diagnostics: {string.Join(", ", withoutPragmaResults.Select(d => d.Id))}. " +
+            $"Pragma-suppressed diagnostics: {string.Join(", ", withPragmaResults.Select(d => d.Id))}.");
+    }
+}
diff --git a/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithPragma.al b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithPragma.al
new file mode 100644
index 0000000..1bd5490
--- /dev/null
+++ b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithPragma.al
@@ -0,0 +1,9 @@
+#pragma warning disable
+codeunit 50101 "With Pragma"
+{
+    procedure PublicProcedureWithoutDocs()
+    begin
+        Message('Hello');
+    end;
+}
+#pragma warning restore
diff --git a/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithoutPragma.al b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithoutPragma.al
new file mode 100644
index 0000000..ce61703
--- /dev/null
+++ b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/WithoutPragma.al
@@ -0,0 +1,7 @@
+codeunit 50100 "Without Pragma"
+{
+    procedure PublicProcedureWithoutDocs()
+    begin
+        Message('Hello');
+    end;
+}
diff --git a/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/app.json b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/app.json
new file mode 100644
index 0000000..bf8cde2
--- /dev/null
+++ b/tests/ALCops.Mcp.Tests/Fixtures/PragmaProject/app.json
@@ -0,0 +1,9 @@
+{
+    "id": "00000000-0000-0000-0000-000000000002",
+    "name": "PragmaTestFixture",
+    "publisher": "ALCops",
+    "version": "1.0.0.0",
+    "platform": "25.0.0.0",
+    "runtime": "15.0",
+    "target": "OnPrem"
+}