diff --git a/system_tests/estimation_test.go b/system_tests/estimation_test.go
index 8dd1163625..eceaebddbe 100644
--- a/system_tests/estimation_test.go
+++ b/system_tests/estimation_test.go
@@ -142,8 +142,8 @@ func TestDifficultyForLatestArbOS(t *testing.T) {
 
 	difficulty, err := simple.GetBlockDifficulty(&bind.CallOpts{})
 	Require(t, err)
-	if arbmath.BigEquals(difficulty, common.Big1) {
-		Fatal(t, "Expected difficulty to be 1 by got:", difficulty)
+	if !arbmath.BigEquals(difficulty, common.Big1) {
+		Fatal(t, "Expected difficulty to be 1 but got:", difficulty)
 	}
 }
 
@@ -164,8 +164,8 @@ func TestDifficultyForArbOSTen(t *testing.T) {
 
 	difficulty, err := simple.GetBlockDifficulty(&bind.CallOpts{})
 	Require(t, err)
-	if arbmath.BigEquals(difficulty, common.Big1) {
-		Fatal(t, "Expected difficulty to be 1 by got:", difficulty)
+	if !arbmath.BigEquals(difficulty, common.Big1) {
+		Fatal(t, "Expected difficulty to be 1 but got:", difficulty)
 	}
 }