diff --git a/tests/report_generator_test.rs b/tests/report_generator_test.rs
new file mode 100644
index 00000000..dc620276
--- /dev/null
+++ b/tests/report_generator_test.rs
@@ -0,0 +1,201 @@
+// Integration test for complete report generator functionality
+// Tests the entire report generation pipeline using generated data for fast execution
+use std::fs;
+use std::path::Path;
+use tempfile::TempDir;
+
+use qqn_optimizer::benchmarks::evaluation::BenchmarkConfig;
+use qqn_optimizer::experiment_runner::{ReportGenerator, UnifiedReportTestSuite};
+
+#[tokio::test]
+async fn test_report_generator_complete_pipeline() -> anyhow::Result<()> {
+    // Create a temporary directory for test output
+    let temp_dir = TempDir::new()?;
+    let output_path = temp_dir.path().to_str().unwrap().to_string();
+
+    // Create test data using the existing test suite
+    let test_data = UnifiedReportTestSuite::create_test_data();
+    
+    // Verify we have test data
+    assert!(!test_data.is_empty(), "Test data should not be empty");
+    assert!(test_data.len() >= 3, "Should have at least 3 test problems");
+
+    // Create ReportGenerator with test configuration
+    let config = BenchmarkConfig::default();
+    let report_generator = ReportGenerator::new(output_path.clone(), config);
+
+    // Convert test data to the format expected by generate_main_report
+    let data_refs: Vec<_> = test_data.iter().map(|(p, r)| (p, r.clone())).collect();
+
+    // Run the complete report generation pipeline
+    println!("Generating complete report with generated data...");
+    report_generator
+        .generate_main_report(&data_refs, false)
+        .await?;
+
+    // Verify that the main output directory structure was created
+    let output_dir = Path::new(&output_path);
+    assert!(output_dir.exists(), "Output directory should exist");
+
+    // Check for expected subdirectories
+    let expected_dirs = ["reports", "data", "convergence", "plots", "latex"];
+    for dir_name in &expected_dirs {
+        let dir_path = output_dir.join(dir_name);
+        assert!(
+            dir_path.exists(),
+            "Directory '{}' should be created",
+            dir_name
+        );
+    }
+
+    // List all generated files for inspection
+    fn list_files(dir: &std::path::Path, indent: usize) -> anyhow::Result<()> {
+        if dir.is_dir() {
+            for entry in fs::read_dir(dir)? {
+                let entry = entry?;
+                let path = entry.path();
+                println!("{}{}", "  ".repeat(indent), path.file_name().unwrap().to_string_lossy());
+                if path.is_dir() {
+                    list_files(&path, indent + 1)?;
+                }
+            }
+        }
+        Ok(())
+    }
+
+    println!("Generated files structure:");
+    list_files(output_dir, 0)?;
+
+    // Verify unified reports were generated in multiple formats
+    let unified_dir = output_dir.join("unified_reports");
+    assert!(
+        unified_dir.exists(),
+        "Unified reports directory should exist"
+    );
+
+    // Check that at least some unified reports exist
+    let html_dir = unified_dir.join("html");
+    let csv_dir = unified_dir.join("csv");
+    let latex_dir = unified_dir.join("latex");
+    let markdown_dir = unified_dir.join("markdown");
+    
+    assert!(html_dir.exists(), "HTML reports directory should exist");
+    assert!(csv_dir.exists(), "CSV reports directory should exist");
+    assert!(latex_dir.exists(), "LaTeX reports directory should exist");
+    assert!(markdown_dir.exists(), "Markdown reports directory should exist");
+
+    // Check specific report files exist in HTML format
+    let html_summary = html_dir.join("summary_statistics.html");
+    assert!(html_summary.exists(), "HTML summary statistics should exist");
+    
+    let html_performance = html_dir.join("performance_table.html");
+    assert!(html_performance.exists(), "HTML performance table should exist");
+
+    // Check CSV format files
+    let csv_summary = csv_dir.join("summary_statistics.csv");
+    assert!(csv_summary.exists(), "CSV summary statistics should exist");
+
+    // Validate HTML content
+    let html_content = fs::read_to_string(html_summary)?;
+    assert!(
+        html_content.contains("<!DOCTYPE html>"),
+        "HTML should contain proper DOCTYPE"
+    );
+    assert!(
+        html_content.len() > 500,
+        "HTML should have substantial content"
+    );
+
+    // Validate CSV content
+    let csv_content = fs::read_to_string(csv_summary)?;
+    assert!(
+        csv_content.contains("Problem_Family") || csv_content.contains("Optimizer"),
+        "CSV should contain expected headers"
+    );
+    assert!(
+        csv_content.lines().count() > 1,
+        "CSV should have header plus data rows"
+    );
+
+    // Verify report index was created
+    let index_file = output_dir.join("report_index.html");
+    assert!(index_file.exists(), "Report index.html should be created");
+
+    // Check that the index file has reasonable content
+    let index_content = fs::read_to_string(index_file)?;
+    assert!(
+        index_content.contains("<!DOCTYPE html>"),
+        "Index should be valid HTML"
+    );
+    assert!(
+        index_content.len() > 500,
+        "Index should have substantial content"
+    );
+
+    // Verify legacy reports exist
+    let benchmark_report = output_dir.join("benchmark_report.md");
+    assert!(benchmark_report.exists(), "Benchmark report should exist");
+
+    // Verify data files exist
+    let data_dir = output_dir.join("data");
+    let detailed_results = data_dir.join("detailed_results.csv");
+    assert!(detailed_results.exists(), "Detailed results CSV should exist");
+
+    let summary_stats = data_dir.join("summary_statistics.csv");
+    assert!(summary_stats.exists(), "Summary statistics CSV should exist");
+
+    // Verify LaTeX files exist
+    let latex_dir = output_dir.join("latex");
+    let comprehensive_tex = latex_dir.join("comprehensive_benchmark_report.tex");
+    assert!(comprehensive_tex.exists(), "Comprehensive LaTeX report should exist");
+
+    println!("✓ All expected directories created");
+    println!("✓ Report files generated successfully");
+    println!("✓ Directory structure created correctly");
+    println!("✓ Complete report generation pipeline test passed");
+
+    Ok(())
+}
+
+#[tokio::test]
+async fn test_report_generator_with_family_mode() -> anyhow::Result<()> {
+    // Test the family optimization mode as well
+    let temp_dir = TempDir::new()?;
+    let output_path = temp_dir.path().to_str().unwrap().to_string();
+
+    let test_data = UnifiedReportTestSuite::create_test_data();
+    let config = BenchmarkConfig::default();
+    let report_generator = ReportGenerator::new(output_path.clone(), config);
+    let data_refs: Vec<_> = test_data.iter().map(|(p, r)| (p, r.clone())).collect();
+
+    // Run with family optimization enabled
+    report_generator
+        .generate_main_report(&data_refs, true)
+        .await?;
+
+    let output_dir = Path::new(&output_path);
+    assert!(output_dir.exists(), "Output directory should exist");
+
+    // Verify the same basic structure exists
+    let index_file = output_dir.join("report_index.html");
+    assert!(index_file.exists(), "Report index.html should be created");
+
+    // Verify unified reports directory exists
+    let unified_dir = output_dir.join("unified_reports");
+    assert!(unified_dir.exists(), "Unified reports directory should exist");
+
+    println!("✓ Family mode report generation test passed");
+
+    Ok(())
+}
+
+#[test]
+fn test_report_generator_creation() {
+    // Test basic ReportGenerator creation
+    let config = BenchmarkConfig::default();
+    let _report_generator = ReportGenerator::new("test_output".to_string(), config);
+    
+    // This is a simple validation that the struct can be created
+    // More detailed testing happens in the async tests above
+    // Note: output_dir field is private, so we just test successful creation
+}
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