diff --git a/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryMetricsTests.cs b/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryMetricsTests.cs
index 378bf7167e..c741dfb7cf 100644
--- a/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryMetricsTests.cs
+++ b/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryMetricsTests.cs
@@ -35,8 +35,9 @@ protected OpenTelemetryMetricsTestsBase(TFixture fixture, ITestOutputHelper outp
             {
                 _fixture.AgentLog.WaitForLogLine(AgentLogFile.AgentConnectedLogLineRegex, TimeSpan.FromMinutes(1));
 
-                // otlp metrics export will be complete before the first analytics event harvest
-                _fixture.AgentLog.WaitForLogLine(AgentLogFile.AnalyticsEventDataLogLineRegex, TimeSpan.FromMinutes(1));
+                // Wait for actual OTLP metrics export (every 5s) rather than the analytics event
+                // harvest (every 60s), which can race with the WaitForLogLine timeout on slow CI.
+                _fixture.AgentLog.WaitForLogLine(AgentLogFile.OtlpMetricsExportedLogLineRegex, TimeSpan.FromMinutes(1));
 
                 _otlpSummaries = _fixture.GetCollectedOTLPMetrics();
             }
diff --git a/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryStressTests.cs b/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryStressTests.cs
index fa92f149a6..bad508de53 100644
--- a/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryStressTests.cs
+++ b/tests/Agent/IntegrationTests/IntegrationTests/OpenTelemetry/OpenTelemetryStressTests.cs
@@ -40,12 +40,10 @@ protected OpenTelemetryStressTestsBase(TFixture fixture, ITestOutputHelper outpu
                 _fixture.TestLogger.WriteLine($"Agent Log Path: {_fixture.AgentLog?.FilePath}");
                 _fixture.AgentLog.WaitForLogLine(AgentLogFile.AgentConnectedLogLineRegex, TimeSpan.FromMinutes(2));
 
-                // Wait for workload to complete - give more time for all metrics to be collected
-                _fixture.AgentLog.WaitForLogLine(AgentLogFile.AnalyticsEventDataLogLineRegex, TimeSpan.FromMinutes(5));
-
-                // Add extra delay to ensure all metrics are exported
-                // Increased from 30 to 45 seconds for slower CI environments
-                System.Threading.Thread.Sleep(TimeSpan.FromSeconds(45));
+                // Wait for at least 3 OTLP exports (every 5s) to ensure sufficient metric data.
+                // This replaces a 60s analytic_event_data wait + 45s Thread.Sleep that added
+                // ~105s of unnecessary delay.
+                _fixture.AgentLog.WaitForLogLines(AgentLogFile.OtlpMetricsExportedLogLineRegex, TimeSpan.FromMinutes(2), 3);
 
                 // Don't specify exact count - just get what's available with a reasonable max
                 _otlpSummaries = _fixture.GetCollectedOTLPMetrics(count: 1000);
diff --git a/tests/Agent/IntegrationTests/SharedApplications/Common/MultiFunctionApplicationHelpers/NetStandardLibraries/PerformanceMetrics.cs b/tests/Agent/IntegrationTests/SharedApplications/Common/MultiFunctionApplicationHelpers/NetStandardLibraries/PerformanceMetrics.cs
index 468aa08887..0b21a5eead 100644
--- a/tests/Agent/IntegrationTests/SharedApplications/Common/MultiFunctionApplicationHelpers/NetStandardLibraries/PerformanceMetrics.cs
+++ b/tests/Agent/IntegrationTests/SharedApplications/Common/MultiFunctionApplicationHelpers/NetStandardLibraries/PerformanceMetrics.cs
@@ -35,6 +35,13 @@ private static void StartAgent()
         // We need atleast one known GC invocation to verify our GC metrics.
         GC.Collect();
 
+        // Gen0-only collections ensure the GCSamplerV2's per-generation counting
+        // (which subtracts higher-gen counts from lower-gen counts) reports non-zero
+        // Gen0 collections. Without these, a full GC.Collect() increments all generation
+        // counters equally, and the subtraction can yield zero on fast-starting processes.
+        GC.Collect(0);
+        GC.Collect(0);
+
         // Get everything started up and time for initial Sample().
         Thread.Sleep(TimeSpan.FromSeconds(10));
     }