diff --git a/tests/abc/GoodnessOfFit.lua b/tests/abc/GoodnessOfFit.lua
new file mode 100644
index 0000000..dd318fd
--- /dev/null
+++ b/tests/abc/GoodnessOfFit.lua
@@ -0,0 +1,44 @@
+
+return{
+	multiLevel = function(unitTest)
+		local cs = CellularSpace{
+			file = filePath("costanza.pgm", "calibration")}
+		local cs2 = CellularSpace{
+			file = filePath("costanza2.pgm", "calibration"),
+			attrname = "costanza"}
+
+		-- Discrete Tests:
+		local result, data = multiLevel{
+			target = {cs, cs2},
+			select = "costanza",
+			discrete = true
+		}
+
+		unitTest:assertEquals(result, 0.865, 0.01) -- 0.84 is the Total Fitness in Costanza Paper Example.
+
+		local chart = _Gtme.Chart{
+			target = data,
+			select = "fit"
+		}
+
+		unitTest:assertSnapshot(chart, "costanza-original.png")
+
+		result, data = multiLevel{
+			target = {cs, cs2},
+			select = "costanza",
+			log = true,
+			discrete = true
+		}
+
+		unitTest:assertEquals(result, 0.85, 0.01)
+
+		chart = _Gtme.Chart{
+			target = data,
+			select = "fit",
+			xLabel = "Window Size",
+			yLabel = "Fit"
+		}
+
+		unitTest:assertSnapshot(chart, "costanza-log.png")
+	end
+}