diff --git a/transaction_test.go b/transaction_test.go
index c53667a..81714cc 100644
--- a/transaction_test.go
+++ b/transaction_test.go
@@ -274,3 +274,75 @@ func TestEnv(t *testing.T) {
 	}
 	runtime.GC()
 }
+
+func TestFailure_001(t *testing.T) {
+	tx := Transaction{}
+	_, err := tx.GetEnvList()
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_002(t *testing.T) {
+	tx := Transaction{}
+	err := tx.PutEnv("")
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_003(t *testing.T) {
+	tx := Transaction{}
+	err := tx.CloseSession(0)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_004(t *testing.T) {
+	tx := Transaction{}
+	err := tx.OpenSession(0)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_005(t *testing.T) {
+	tx := Transaction{}
+	err := tx.ChangeAuthTok(0)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_006(t *testing.T) {
+	tx := Transaction{}
+	err := tx.AcctMgmt(0)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_007(t *testing.T) {
+	tx := Transaction{}
+	err := tx.SetCred(0)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_008(t *testing.T) {
+	tx := Transaction{}
+	err := tx.SetItem(User, "test")
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}
+
+func TestFailure_009(t *testing.T) {
+	tx := Transaction{}
+	_, err := tx.GetItem(User)
+	if err == nil {
+		t.Fatalf("getenvlist #expected an error")
+	}
+}