2 files changed, 5 insertions, 3 deletions
diff --git a/src/main/java/au/id/zancanaro/javacheck/state/CommandList.java b/src/main/java/au/id/zancanaro/javacheck/state/CommandList.java
index 05000f2..31fbc12 100644
--- a/src/main/java/au/id/zancanaro/javacheck/state/CommandList.java
+++ b/src/main/java/au/id/zancanaro/javacheck/state/CommandList.java
@@ -4,8 +4,10 @@ import java.util.*;
 
 public class CommandList<S> {
     private final List<GeneratedCommand<S, ?, ?>> commands;
+    private final S initialState;
 
-    public CommandList(List<GeneratedCommand<S, ?, ?>> commands) {
+    public CommandList(S initialState, List<GeneratedCommand<S, ?, ?>> commands) {
+        this.initialState = initialState;
         this.commands = new ArrayList<>(commands);
     }
 
@@ -67,7 +69,7 @@ public class CommandList<S> {
     }
 
     public boolean isValid() {
-        CommandResult<S> result = CommandResult.success(null);
+        CommandResult<S> result = CommandResult.success(initialState);
         for (GeneratedCommand<S, ?, ?> generated : commands) {
             result = runAbstractCommand(generated, result.getState());
             if (result.isFailed()) {
diff --git a/src/main/java/au/id/zancanaro/javacheck/state/CommandListGenerator.java b/src/main/java/au/id/zancanaro/javacheck/state/CommandListGenerator.java
index 1600f07..c5cda59 100644
--- a/src/main/java/au/id/zancanaro/javacheck/state/CommandListGenerator.java
+++ b/src/main/java/au/id/zancanaro/javacheck/state/CommandListGenerator.java
@@ -46,7 +46,7 @@ public class CommandListGenerator<S> implements Generator<CommandList<S>> {
             state = nextState(i, generatedCommand, state);
         }
         return ShrinkTree.combine(commandTrees, ShrinkTree::removeAndPromoteChildren)
-                .map(list -> new CommandList<>(list))
+                .map(list -> new CommandList<>(initialState, list))
                 .filter(CommandList::isValid);
     }
 }