diff --git a/core/src/test/java/org/bitcoinj/core/BlockChainTest.java b/core/src/test/java/org/bitcoinj/core/BlockChainTest.java
index 985359be8..8d2e4a12d 100644
--- a/core/src/test/java/org/bitcoinj/core/BlockChainTest.java
+++ b/core/src/test/java/org/bitcoinj/core/BlockChainTest.java
@@ -39,7 +39,6 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-import java.math.BigInteger;
 import java.time.Duration;
 import java.time.Instant;
 import java.time.format.DateTimeFormatter;
@@ -213,20 +212,12 @@ public class BlockChainTest {
         assertTrue(chain.add(newBlock));
     }
 
-    private static class TweakableTestNet3Params extends TestNet3Params {
-        public void setMaxTarget(BigInteger limit) {
-            maxTarget = limit;
-        }
-    }
-
     @Test
-    public void badDifficulty() throws Exception {
-        TweakableTestNet3Params TWEAKABLE_TESTNET = new TweakableTestNet3Params();
-
+    public void badDifficultyTarget() throws Exception {
         assertTrue(testNetChain.add(getBlock1()));
         Block b2 = getBlock2();
         assertTrue(testNetChain.add(b2));
-        Block bad = new Block(TWEAKABLE_TESTNET, Block.BLOCK_VERSION_GENESIS);
+        Block bad = new Block(TESTNET, Block.BLOCK_VERSION_GENESIS);
         // Merkle root can be anything here, doesn't matter.
         bad.setMerkleRoot(Sha256Hash.wrap("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"));
         // Nonce was just some number that made the hash < difficulty limit set below, it can be anything.
@@ -245,20 +236,6 @@ public class BlockChainTest {
         } catch (VerificationException e) {
             assertTrue(e.getMessage(), e.getCause().getMessage().contains("Difficulty target is bad"));
         }
-
-        // Accept any level of difficulty now.
-        BigInteger oldVal = TWEAKABLE_TESTNET.getMaxTarget();
-        TWEAKABLE_TESTNET.setMaxTarget(new BigInteger("00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16));
-        try {
-            testNetChain.add(bad);
-            // We should not get here as the difficulty target should not be changing at this point.
-            fail();
-        } catch (VerificationException e) {
-            assertTrue(e.getMessage(), e.getCause().getMessage().contains("Unexpected change in difficulty"));
-        }
-        TWEAKABLE_TESTNET.setMaxTarget(oldVal);
-
-        // TODO: Test difficulty change is not out of range when a transition period becomes valid.
     }
 
     /**