diff --git a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Compile.cs b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Compile.cs
index 01bf011c15..5d74547a04 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Compile.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Compile.cs
@@ -399,7 +399,7 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 			});
 		}
 
-		public void Run()
+		public override void Run()
 		{
 			//in params
 			var cue = IN_CueFile;
diff --git a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Load.cs b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Load.cs
index 701e173bce..7ad80b45d8 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Load.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Load.cs
@@ -163,7 +163,7 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 			OUT_Disc.RawTOCEntries.Add(new RawTOCEntry { QData = toc_sq });
 		}
 
-		public void Run()
+		public override void Run()
 		{
 			//params
 			var compiled = IN_CompileJob;
diff --git a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Parse.cs b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Parse.cs
index 04564603c5..580e100f95 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Parse.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Parse.cs
@@ -375,10 +375,10 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 			job.FinishLog();
 		} //LoadFromString
 
-		public void Run(ParseCueJob job)
+		public override void Run()
 		{
-			job.OUT_CueFile = new CUE_File();
-			job.LoadFromString(job);
+			OUT_CueFile = new CUE_File();
+			LoadFromString(this);
 		}
 	}
 
diff --git a/src/BizHawk.Emulation.DiscSystem/DiscJob.cs b/src/BizHawk.Emulation.DiscSystem/DiscJob.cs
index b619707133..56a7bf0245 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscJob.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscJob.cs
@@ -8,7 +8,7 @@ namespace BizHawk.Emulation.DiscSystem
 	/// Returns WARNINGS for things which will are irregular or erroneous but later jobs might be able to handle, or which can be worked around by configuration assumptions.
 	/// TODO - make IDisposable so I don't have to remember to Finish() it?
 	/// </summary>
-	public class DiscJob
+	public abstract class DiscJob
 	{
 		internal int CurrentLine = -1;
 
@@ -51,6 +51,8 @@ namespace BizHawk.Emulation.DiscSystem
 			OUT_ErrorLevel |= job.OUT_ErrorLevel;
 			swLog.Write(job.OUT_Log);
 		}
+
+		public abstract void Run();
 	}
 
 	internal class DiscJobAbortException : Exception
diff --git a/src/BizHawk.Emulation.DiscSystem/DiscMountJob.cs b/src/BizHawk.Emulation.DiscSystem/DiscMountJob.cs
index 4f1029e248..0c63c6a53b 100644
--- a/src/BizHawk.Emulation.DiscSystem/DiscMountJob.cs
+++ b/src/BizHawk.Emulation.DiscSystem/DiscMountJob.cs
@@ -44,7 +44,7 @@ namespace BizHawk.Emulation.DiscSystem
 		public bool OUT_SlowLoadAborted { get; private set; }
 
 		/// <exception cref="NotSupportedException"><see cref="IN_DiscInterface"/> is <see cref="DiscInterface.LibMirage"/></exception>
-		public void Run()
+		public override void Run()
 		{
 			switch (IN_DiscInterface)
 			{
@@ -136,7 +136,7 @@ namespace BizHawk.Emulation.DiscSystem
 				cue_content ??= File.ReadAllText(cuePath);
 				parseJob.IN_CueString = cue_content;
 				bool okParse = true;
-				try { parseJob.Run(parseJob); }
+				try { parseJob.Run(); }
 				catch (DiscJobAbortException) { okParse = false; parseJob.FinishLog(); }
 				if (!string.IsNullOrEmpty(parseJob.OUT_Log)) Console.WriteLine(parseJob.OUT_Log);
 				ConcatenateJobLog(parseJob);
diff --git a/src/BizHawk.Emulation.DiscSystem/Internal/Jobs/LoadSBIJob.cs b/src/BizHawk.Emulation.DiscSystem/Internal/Jobs/LoadSBIJob.cs
index ff0ddaf0dd..1a62038b6b 100644
--- a/src/BizHawk.Emulation.DiscSystem/Internal/Jobs/LoadSBIJob.cs
+++ b/src/BizHawk.Emulation.DiscSystem/Internal/Jobs/LoadSBIJob.cs
@@ -21,7 +21,7 @@ namespace BizHawk.Emulation.DiscSystem.SBI
 		public SubQPatchData OUT_Data { get; private set; }
 
 		/// <exception cref="SBIParseException">file at <see cref="IN_Path"/> does not contain valid header or contains misformatted record</exception>
-		public void Run()
+		public override void Run()
 		{
 			using var fs = File.OpenRead(IN_Path);
 			BinaryReader br = new BinaryReader(fs);