diff --git a/tests/difficulty_test.go b/tests/difficulty_test.go
index cb4202bbb..311fae7eb 100644
--- a/tests/difficulty_test.go
+++ b/tests/difficulty_test.go
@@ -25,7 +25,7 @@ import (
 )
 
 func TestDifficulty(t *testing.T) {
-	t.Parallel()
+	//t.Parallel()
 
 	dt := new(testMatcher)
 
diff --git a/tests/init_test.go b/tests/init_test.go
index c5667ea4b..ad32c9ea9 100644
--- a/tests/init_test.go
+++ b/tests/init_test.go
@@ -226,7 +226,7 @@ func (tm *testMatcher) runTestFile(t *testing.T, path, name string, runTest inte
 			t.Skip("Skipped by whitelist")
 		}
 	}
-	t.Parallel()
+	//t.Parallel()
 
 	// Load the file as map[string]<testType>.
 	m := makeMapFromTestFunc(runTest)
@@ -281,7 +281,7 @@ func runTestFunc(runTest interface{}, t *testing.T, name string, m reflect.Value
 }
 
 func TestMatcherWhitelist(t *testing.T) {
-	t.Parallel()
+	//t.Parallel()
 	tm := new(testMatcher)
 	tm.whitelist("invalid*")
 	tm.walk(t, rlpTestDir, func(t *testing.T, name string, test *RLPTest) {
diff --git a/tests/rlp_test.go b/tests/rlp_test.go
index ec0ebe08d..45fab8db0 100644
--- a/tests/rlp_test.go
+++ b/tests/rlp_test.go
@@ -23,7 +23,7 @@ import (
 )
 
 func TestRLP(t *testing.T) {
-	t.Parallel()
+	//t.Parallel()
 	tm := new(testMatcher)
 	tm.walk(t, rlpTestDir, func(t *testing.T, name string, test *RLPTest) {
 		if err := tm.checkFailure(t, test.Run()); err != nil {
diff --git a/tests/state_test.go b/tests/state_test.go
index 15766aa1b..f3523415a 100644
--- a/tests/state_test.go
+++ b/tests/state_test.go
@@ -38,7 +38,7 @@ func TestState(t *testing.T) {
 	if runtime.GOOS == "windows" {
 		t.Skip("fix me on win please") // it's too slow on win, need generally improve speed of this tests
 	}
-	t.Parallel()
+	//t.Parallel()
 
 	st := new(testMatcher)
 
diff --git a/tests/transaction_test.go b/tests/transaction_test.go
index 1286ec3f5..aec17b308 100644
--- a/tests/transaction_test.go
+++ b/tests/transaction_test.go
@@ -25,7 +25,7 @@ import (
 )
 
 func TestTransaction(t *testing.T) {
-	t.Parallel()
+	//t.Parallel()
 
 	txt := new(testMatcher)