diff --git a/Runner/Helpers/JitDiffUtils.cs b/Runner/Helpers/JitDiffUtils.cs
index 20e30f2..d8c4208 100644
--- a/Runner/Helpers/JitDiffUtils.cs
+++ b/Runner/Helpers/JitDiffUtils.cs
@@ -24,6 +24,13 @@ private static async Task RunJitDiffAsync(JobBase job, string coreRootFolder, st
         bool debugInfo = job.TryGetFlag("debuginfo");
         bool gcInfo = job.TryGetFlag("gcinfo");
 
+        List<(string, string)> envVars = [];
+
+        if (job.TryGetFlag("JitDisasmWithGC"))
+        {
+            envVars.Add(("DOTNET_JitDisasmWithGC", "1"));
+        }
+
         await job.RunProcessAsync("jitutils/bin/jit-diff",
             $"diff " +
             (debugInfo ? "--debuginfo " : "") +
@@ -35,7 +42,8 @@ await job.RunProcessAsync("jitutils/bin/jit-diff",
             $"{frameworksOrAssembly} --pmi " +
             $"--core_root {coreRootFolder} " +
             $"--base {checkedClrFolder}",
-            logPrefix: $"jit-diff {coreRootFolder}");
+            logPrefix: $"jit-diff {coreRootFolder}",
+            envVars: envVars);
     }
 
     public static async Task<string> RunJitAnalyzeAsync(JobBase job, string mainDirectory, string prDirectory, int count = 100)
diff --git a/Runner/JobBase.cs b/Runner/JobBase.cs
index dc026f6..6a97b27 100644
--- a/Runner/JobBase.cs
+++ b/Runner/JobBase.cs
@@ -315,6 +315,7 @@ public async Task<int> RunProcessAsync(
         bool suppressOutputLogs = false,
         bool suppressStartingLog = false,
         ProcessPriorityClass priority = ProcessPriorityClass.Normal,
+        List<(string, string)>? envVars = null,
         CancellationToken cancellationToken = default)
     {
         processLogs ??= i => i;
@@ -334,14 +335,24 @@ public async Task<int> RunProcessAsync(
             await LogAsync($"{logPrefix}{processLogs($"Running '{fileName} {arguments}'{(workDir is null ? null : $" from '{workDir}'")}")}");
         }
 
-        using var process = new Process
+        var startInfo = new ProcessStartInfo(fileName, arguments)
+        {
+            RedirectStandardError = true,
+            RedirectStandardOutput = true,
+            WorkingDirectory = workDir ?? string.Empty,
+        };
+
+        if (envVars is not null)
         {
-            StartInfo = new ProcessStartInfo(fileName, arguments)
+            foreach ((string key, string value) in envVars)
             {
-                RedirectStandardError = true,
-                RedirectStandardOutput = true,
-                WorkingDirectory = workDir ?? string.Empty,
+                startInfo.EnvironmentVariables.Add(key, value);
             }
+        }
+
+        using var process = new Process
+        {
+            StartInfo = startInfo
         };
 
         using var cts = CancellationTokenSource.CreateLinkedTokenSource(JobTimeout, cancellationToken);