fix test

src/main/java/gregtech/api/capability/MultipleTankHandler.java

@@ -84,6 +84,12 @@ public final int getIndexOfFluid(@Nullable FluidStack fluidStack) {
         return -1;
     }
 
+    public int simulateFill(FluidStack stack, int amount) {
+        var insertable = stack.copy();
+        insertable.amount = amount;
+        return fill(insertable, false);
+    }
+
     @Override
     public final @NotNull Iterator<Entry> iterator() {
         return getFluidTanks().iterator();

src/main/java/gregtech/api/recipes/logic/ParallelLogic.java

@@ -257,7 +257,7 @@ public static int limitParallelByItemsIncremental(@NotNull List<ItemStack> recip
      *         voiding products.
      */
     public static int limitParallelByFluids(@NotNull Recipe recipe,
-                                            @NotNull MultipleTankHandler overlayedFluidHandler, int multiplier) {
+                                            @NotNull MultipleTankHandler tankHandler, int multiplier) {
         int minMultiplier = 0;
         int maxMultiplier = multiplier;
 
@@ -273,7 +273,7 @@ public static int limitParallelByFluids(@NotNull Recipe recipe,
                 } else {
                     amountLeft = fluidStack.amount * multiplier;
                 }
-                int inserted = overlayedFluidHandler.fill(fluidStack, false);
+                int inserted = tankHandler.simulateFill(fluidStack, amountLeft);
                 if (inserted > 0) {
                     amountLeft -= inserted;
                 }