diff --git a/MultiversalDiplomacy/Script/AdjudicationQueryScriptHandler.cs b/MultiversalDiplomacy/Script/AdjudicationQueryScriptHandler.cs
index dd1f253..683089b 100644
--- a/MultiversalDiplomacy/Script/AdjudicationQueryScriptHandler.cs
+++ b/MultiversalDiplomacy/Script/AdjudicationQueryScriptHandler.cs
@@ -17,7 +17,7 @@ public class AdjudicationQueryScriptHandler(World world, bool strict = false) :
 
     public IScriptHandler? HandleInput(string input)
     {
-        var args = input.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+        var args = input.Split(' ', 2, StringSplitOptions.RemoveEmptyEntries);
         if (args.Length == 0 || input.StartsWith('#'))
         {
             return this;
@@ -35,16 +35,7 @@ public class AdjudicationQueryScriptHandler(World world, bool strict = false) :
                 break;
 
             case "assert":
-                string assertion = input["assert ".Length..];
-                Regex prov = new($"{World.Map.ProvinceRegex} (.*)");
-                Match match = prov.Match(assertion);
-                if (!match.Success) {
-                    Console.WriteLine($"Could not parse province from \"{assertion}\"");
-                    return Strict ? null : this;
-                }
-                // TODO look up order once orders are validated and adjudicated
-                Console.WriteLine("Order lookup not implemented yet");
-                return null;
+                return HandleAssertion(args[1]);
 
             case "status":
                 throw new NotImplementedException();
@@ -57,4 +48,20 @@ public class AdjudicationQueryScriptHandler(World world, bool strict = false) :
 
         return this;
     }
+
+    private AdjudicationQueryScriptHandler? HandleAssertion(string assertion)
+    {
+        // Simple assertions
+        switch (assertion)
+        {
+            case "true":
+                return this;
+
+            case "false":
+                return null;
+        }
+            
+        Console.WriteLine("Order lookup not implemented yet");
+        return this;
+    }
 }
diff --git a/MultiversalDiplomacyTests/ReplDriver.cs b/MultiversalDiplomacyTests/ReplDriver.cs
index ff3b99f..b6f1f15 100644
--- a/MultiversalDiplomacyTests/ReplDriver.cs
+++ b/MultiversalDiplomacyTests/ReplDriver.cs
@@ -16,7 +16,7 @@ public class ReplDriver(IScriptHandler initialHandler, bool echo = false)
     bool Echo { get; } = echo;
 
     /// <summary>
-    /// Input a multiline string into the repl. Call <see cref="Ready"/> or <see cref="Closed"/> at the end so the
+    /// Input a multiline string into the repl. Call <see cref="AssertReady"/> or <see cref="AssertClosed"/> at the end so the
     /// statement is valid.
     /// </summary>
     public ReplDriver this[string input] => ExecuteAll(input);
@@ -39,13 +39,13 @@ public class ReplDriver(IScriptHandler initialHandler, bool echo = false)
         return this;
     }
 
-    public void Ready()
+    public void AssertReady()
     {
-        Assert.That(Handler, Is.Not.Null, "Handler is closed");
+        if (Handler is null) Assert.Fail($"Handler terminated after \"{LastInput}\"");
     }
 
-    public void Closed()
+    public void AssertClosed()
     {
-        Assert.That(Handler, Is.Null, "Handler is not closed");
+        if (Handler is not null) Assert.Fail($"Handler did not terminate after \"{LastInput}\"");
     }
 }
diff --git a/MultiversalDiplomacyTests/ReplTest.cs b/MultiversalDiplomacyTests/ReplTest.cs
index 77aa1a8..d6c6f46 100644
--- a/MultiversalDiplomacyTests/ReplTest.cs
+++ b/MultiversalDiplomacyTests/ReplTest.cs
@@ -18,7 +18,7 @@ public class ReplTest
         unit Germany A Munich
         unit Austria Army Tyrolia
         unit England F Lon
-        """].Ready();
+        """].AssertReady();
 
         Assert.That(repl.Handler, Is.TypeOf<SetupScriptHandler>());
         SetupScriptHandler handler = (SetupScriptHandler)repl.Handler!;
@@ -29,7 +29,7 @@ public class ReplTest
 
         repl["""
         ---
-        """].Ready();
+        """].AssertReady();
 
         Assert.That(repl.Handler, Is.TypeOf<GameScriptHandler>());
     }
@@ -50,7 +50,7 @@ public class ReplTest
         Austria: Army Tyrolia - Vienna
         England:
         Lon h
-        """].Ready();
+        """].AssertReady();
 
         Assert.That(repl.Handler, Is.TypeOf<GameScriptHandler>());
         GameScriptHandler handler = (GameScriptHandler)repl.Handler!;
@@ -64,11 +64,23 @@ public class ReplTest
 
         repl["""
         ---
-        """].Ready();
+        """].AssertReady();
 
         Assert.That(repl.Handler, Is.TypeOf<AdjudicationQueryScriptHandler>());
         var newHandler = (AdjudicationQueryScriptHandler)repl.Handler!;
         Assert.That(newHandler.World, Is.Not.EqualTo(before));
         Assert.That(newHandler.World.Timelines.Pasts.Count, Is.EqualTo(2));
     }
+
+    [Test]
+    public void AssertBasic()
+    {
+        var repl = new ReplDriver(new SetupScriptHandler(World.WithStandardMap(), strict: true))["""
+        unit Germany A Munich
+        ---
+        ---
+        """];
+        repl["assert true"].AssertReady();
+        repl["assert false"].AssertClosed();
+    }
 }