diff --git a/src/EphemeralMongo.Core/MongoRunner.cs b/src/EphemeralMongo.Core/MongoRunner.cs
index f763d1c..2aecbeb 100644
--- a/src/EphemeralMongo.Core/MongoRunner.cs
+++ b/src/EphemeralMongo.Core/MongoRunner.cs
@@ -27,7 +27,8 @@ private MongoRunner(IFileSystem fileSystem, IPortFactory portFactory, IMongoExec
 
     public static IMongoRunner Run(MongoRunnerOptions? options = null)
     {
-        var runner = new MongoRunner(new FileSystem(), new PortFactory(), new MongoExecutableLocator(), new MongoProcessFactory(), options ?? new MongoRunnerOptions());
+        var optionsCopy = options == null ? new MongoRunnerOptions() : new MongoRunnerOptions(options);
+        var runner = new MongoRunner(new FileSystem(), new PortFactory(), new MongoExecutableLocator(), new MongoProcessFactory(), optionsCopy);
         return runner.RunInternal();
     }
 
diff --git a/src/EphemeralMongo.Core/MongoRunnerOptions.cs b/src/EphemeralMongo.Core/MongoRunnerOptions.cs
index 73f636e..cc26bae 100644
--- a/src/EphemeralMongo.Core/MongoRunnerOptions.cs
+++ b/src/EphemeralMongo.Core/MongoRunnerOptions.cs
@@ -7,6 +7,30 @@ public sealed class MongoRunnerOptions
     private TimeSpan _connectionTimeout = TimeSpan.FromSeconds(30);
     private TimeSpan _replicaSetSetupTimeout = TimeSpan.FromSeconds(10);
 
+    public MongoRunnerOptions()
+    {
+    }
+
+    public MongoRunnerOptions(MongoRunnerOptions options)
+    {
+        if (options == null)
+        {
+            throw new ArgumentNullException(nameof(options));
+        }
+
+        this._dataDirectory = options._dataDirectory;
+        this._binaryDirectory = options._binaryDirectory;
+        this._connectionTimeout = options._connectionTimeout;
+        this._replicaSetSetupTimeout = options._replicaSetSetupTimeout;
+
+        this.AdditionalArguments = options.AdditionalArguments;
+        this.UseSingleNodeReplicaSet = options.UseSingleNodeReplicaSet;
+        this.StandardOuputLogger = options.StandardOuputLogger;
+        this.StandardErrorLogger = options.StandardErrorLogger;
+        this.ReplicaSetName = options.ReplicaSetName;
+        this.MongoPort = options.MongoPort;
+    }
+
     public string? DataDirectory
     {
         get => this._dataDirectory;
diff --git a/src/EphemeralMongo.Core/PublicAPI.Shipped.txt b/src/EphemeralMongo.Core/PublicAPI.Shipped.txt
index 4e2c10e..02b10cb 100644
--- a/src/EphemeralMongo.Core/PublicAPI.Shipped.txt
+++ b/src/EphemeralMongo.Core/PublicAPI.Shipped.txt
@@ -1,4 +1,4 @@
-#nullable enable
+#nullable enable
 EphemeralMongo.IMongoRunner
 EphemeralMongo.IMongoRunner.ConnectionString.get -> string!
 EphemeralMongo.IMongoRunner.Export(string! database, string! collection, string! outputFilePath, string? additionalArguments = null) -> void
@@ -15,6 +15,7 @@ EphemeralMongo.MongoRunnerOptions.ConnectionTimeout.set -> void
 EphemeralMongo.MongoRunnerOptions.DataDirectory.get -> string?
 EphemeralMongo.MongoRunnerOptions.DataDirectory.set -> void
 EphemeralMongo.MongoRunnerOptions.MongoRunnerOptions() -> void
+EphemeralMongo.MongoRunnerOptions.MongoRunnerOptions(EphemeralMongo.MongoRunnerOptions! options) -> void
 EphemeralMongo.MongoRunnerOptions.ReplicaSetSetupTimeout.get -> System.TimeSpan
 EphemeralMongo.MongoRunnerOptions.ReplicaSetSetupTimeout.set -> void
 EphemeralMongo.MongoRunnerOptions.StandardErrorLogger.get -> EphemeralMongo.Logger?