diff --git a/core/vm/contracts.go b/core/vm/contracts.go
index 9210f5486..79f1a3611 100644
--- a/core/vm/contracts.go
+++ b/core/vm/contracts.go
@@ -591,7 +591,7 @@ func (c *blake2F) Run(input []byte) ([]byte, error) {
 	// Parse the input into the Blake2b call parameters
 	var (
 		rounds = binary.BigEndian.Uint32(input[0:4])
-		final  = (input[212] == blake2FFinalBlockBytes)
+		final  = input[212] == blake2FFinalBlockBytes
 
 		h [8]uint64
 		m [16]uint64
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index db507c481..92be3bf25 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -478,7 +478,7 @@ func opDifficulty(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext)
 }
 
 func opRandom(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
-	v := new(uint256.Int).SetBytes((interpreter.evm.Context.Random.Bytes()))
+	v := new(uint256.Int).SetBytes(interpreter.evm.Context.Random.Bytes())
 	scope.Stack.push(v)
 	return nil, nil
 }
diff --git a/core/vm/memory.go b/core/vm/memory.go
index ba5f8485d..7db230818 100644
--- a/core/vm/memory.go
+++ b/core/vm/memory.go
@@ -17,8 +17,6 @@
 package vm
 
 import (
-	"fmt"
-
 	"github.com/holiman/uint256"
 )
 
@@ -68,7 +66,7 @@ func (m *Memory) Resize(size uint64) {
 	}
 }
 
-// Get returns offset + size as a new slice
+// GetCopy returns offset + size as a new slice
 func (m *Memory) GetCopy(offset, size int64) (cpy []byte) {
 	if size == 0 {
 		return nil
@@ -106,18 +104,3 @@ func (m *Memory) Len() int {
 func (m *Memory) Data() []byte {
 	return m.store
 }
-
-// Print dumps the content of the memory.
-func (m *Memory) Print() {
-	fmt.Printf("### mem %d bytes ###\n", len(m.store))
-	if len(m.store) > 0 {
-		addr := 0
-		for i := 0; i+32 <= len(m.store); i += 32 {
-			fmt.Printf("%03d: % x\n", addr, m.store[i:i+32])
-			addr++
-		}
-	} else {
-		fmt.Println("-- empty --")
-	}
-	fmt.Println("####################")
-}
diff --git a/core/vm/stack.go b/core/vm/stack.go
index 9e7e887cc..e1a957e24 100644
--- a/core/vm/stack.go
+++ b/core/vm/stack.go
@@ -17,7 +17,6 @@
 package vm
 
 import (
-	"fmt"
 	"sync"
 
 	"github.com/holiman/uint256"
@@ -81,16 +80,3 @@ func (st *Stack) peek() *uint256.Int {
 func (st *Stack) Back(n int) *uint256.Int {
 	return &st.data[st.len()-n-1]
 }
-
-// Print dumps the content of the stack
-func (st *Stack) Print() {
-	fmt.Println("### stack ###")
-	if len(st.data) > 0 {
-		for i, val := range st.data {
-			fmt.Printf("%-3d  %s\n", i, val.String())
-		}
-	} else {
-		fmt.Println("-- empty --")
-	}
-	fmt.Println("#############")
-}