diff --git a/src/Runner.Worker/FileCommandManager.cs b/src/Runner.Worker/FileCommandManager.cs
index 0bd838173..0eb7f98be 100644
--- a/src/Runner.Worker/FileCommandManager.cs
+++ b/src/Runner.Worker/FileCommandManager.cs
@@ -329,11 +329,11 @@ namespace GitHub.Runner.Worker
                     var isHeredoc = heredocIndex >= 0 &&
                     (
                         equalsIndex < 0 ||
+                        heredocIndex < equalsIndex ||
                         (
                             heredocIndex > equalsIndex &&
                             OnlyContainsWhiteSpaceBetweenPositions(line, equalsIndex, heredocIndex)
-                        ) ||
-                        heredocIndex < equalsIndex
+                        )
                     );
                     
                     if (isHeredoc)