diff --git a/core/shared/src/main/scala/sigma/VersionContext.scala b/core/shared/src/main/scala/sigma/VersionContext.scala
index 05dd39eb5a..14ed6e36b0 100644
--- a/core/shared/src/main/scala/sigma/VersionContext.scala
+++ b/core/shared/src/main/scala/sigma/VersionContext.scala
@@ -1,6 +1,6 @@
 package sigma
 
-import VersionContext.{EvolutionVersion, JitActivationVersion}
+import VersionContext.{V6SoftForkVersion, JitActivationVersion}
 
 import scala.util.DynamicVariable
 
@@ -24,7 +24,7 @@ case class VersionContext(activatedVersion: Byte, ergoTreeVersion: Byte) {
 
   /** @return true, if the activated script version of Ergo protocol on the network is
    * including Evolution update. */
-  def isEvolutionActivated: Boolean = activatedVersion >= EvolutionVersion
+  def isV6SoftForkActivated: Boolean = activatedVersion >= V6SoftForkVersion
 }
 
 object VersionContext {
@@ -46,7 +46,7 @@ object VersionContext {
   /**
    * The version of ErgoTree corresponding to "evolution" (6.0) soft-fork
    */
-  val EvolutionVersion: Byte = 3
+  val V6SoftForkVersion: Byte = 3
 
   private val _defaultContext = VersionContext(
     activatedVersion = 1/* v4.x */,
diff --git a/core/shared/src/test/scala/sigma/VersionTesting.scala b/core/shared/src/test/scala/sigma/VersionTesting.scala
index 69e15ff491..bd3e3b8872 100644
--- a/core/shared/src/test/scala/sigma/VersionTesting.scala
+++ b/core/shared/src/test/scala/sigma/VersionTesting.scala
@@ -6,11 +6,11 @@ import scala.util.DynamicVariable
 
 trait VersionTesting {
 
-  /** Tests run for both version 2 & version 3 */
+  /** Tests run for all supported versions starting from 0. */
   protected val activatedVersions: Seq[Byte] =
     (0 to VersionContext.MaxSupportedScriptVersion).map(_.toByte).toArray[Byte]
 
-  private[sigma] val _currActivatedVersion = new DynamicVariable[Byte](3) // v6.x by default
+  private[sigma] val _currActivatedVersion = new DynamicVariable[Byte](2) // v5.x by default
 
   /** Current activated version used in tests. */
   def activatedVersionInTests: Byte = _currActivatedVersion.value
diff --git a/interpreter/shared/src/main/scala/sigmastate/types.scala b/interpreter/shared/src/main/scala/sigmastate/types.scala
index db8b1faf7f..34408d2bf0 100644
--- a/interpreter/shared/src/main/scala/sigmastate/types.scala
+++ b/interpreter/shared/src/main/scala/sigmastate/types.scala
@@ -914,7 +914,7 @@ case object SBoolean extends SPrimType with SEmbeddable with SLogical with SProd
     .withInfo(PropertyCall, "Convert true to 1 and false to 0")
 
   protected override def getMethods(): Seq[SMethod] = {
-    if (VersionContext.current.isEvolutionActivated) {
+    if (VersionContext.current.isV6SoftForkActivated) {
       super.getMethods() ++ Seq(ToByteMethod)
     } else {
       super.getMethods()
diff --git a/sc/shared/src/main/scala/sigmastate/eval/GraphBuilding.scala b/sc/shared/src/main/scala/sigmastate/eval/GraphBuilding.scala
index 001c1c43d6..770a07e0dc 100644
--- a/sc/shared/src/main/scala/sigmastate/eval/GraphBuilding.scala
+++ b/sc/shared/src/main/scala/sigmastate/eval/GraphBuilding.scala
@@ -510,7 +510,7 @@ trait GraphBuilding extends SigmaLibrary { IR: IRContext =>
         else
           error(s"The type of $obj is expected to be Collection to select 'size' property", obj.sourceContext.toOption)
 
-      case Select(obj, SBoolean.ToByte, _) if obj.tpe.isBoolean && VersionContext.current.isEvolutionActivated =>
+      case Select(obj, SBoolean.ToByte, _) if obj.tpe.isBoolean && VersionContext.current.isV6SoftForkActivated =>
           val bool = eval(obj.asBoolValue)
           bool.toByte
 
diff --git a/sc/shared/src/test/scala/sigmastate/ErgoTreeSpecification.scala b/sc/shared/src/test/scala/sigmastate/ErgoTreeSpecification.scala
index 559cb934fd..556f2bddd8 100644
--- a/sc/shared/src/test/scala/sigmastate/ErgoTreeSpecification.scala
+++ b/sc/shared/src/test/scala/sigmastate/ErgoTreeSpecification.scala
@@ -234,7 +234,7 @@ class ErgoTreeSpecification extends SigmaDslTesting with ContractsTestkit {
 
     {
       import SBoolean._
-      if (VersionContext.current.isEvolutionActivated) {
+      if (VersionContext.current.isV6SoftForkActivated) {
         (SBoolean.typeId, Seq(MInfo(1, ToByteMethod)), true)
       } else {
         (SBoolean.typeId, Seq.empty[MInfo], true)
diff --git a/sc/shared/src/test/scala/sigmastate/TestingInterpreterSpecification.scala b/sc/shared/src/test/scala/sigmastate/TestingInterpreterSpecification.scala
index 4d2266b805..65c8b2fa4a 100644
--- a/sc/shared/src/test/scala/sigmastate/TestingInterpreterSpecification.scala
+++ b/sc/shared/src/test/scala/sigmastate/TestingInterpreterSpecification.scala
@@ -9,7 +9,7 @@ import sigmastate.lang.Terms._
 import org.ergoplatform._
 import org.scalatest.BeforeAndAfterAll
 import scorex.util.encode.Base58
-import sigma.VersionContext.EvolutionVersion
+import sigma.VersionContext.V6SoftForkVersion
 import sigma.util.Extensions.IntOps
 import sigmastate.crypto.CryptoConstants
 import sigmastate.helpers.{CompilerTestingCommons, ErgoLikeContextTesting, ErgoLikeTestInterpreter, ErgoLikeTestProvingInterpreter}
@@ -211,8 +211,8 @@ class TestingInterpreterSpecification extends CompilerTestingCommons
         | bool.toByte == 1.toByte && false.toByte == 0.toByte
         |}
         |""".stripMargin
-    if (activatedVersionInTests < EvolutionVersion) {
-      an [sigmastate.exceptions.MethodNotFound] should be thrownBy testEval(source)
+    if (activatedVersionInTests < V6SoftForkVersion) {
+      assertExceptionThrown(testEval(source), rootCauseLike[sigmastate.exceptions.MethodNotFound]("Cannot find method 'toByte'"))
     } else {
       testEval(source)
     }