diff --git a/acceptance-tests/build.gradle b/acceptance-tests/build.gradle
index f732ec2b4fa..79b3c6f52c0 100644
--- a/acceptance-tests/build.gradle
+++ b/acceptance-tests/build.gradle
@@ -1,4 +1,6 @@
 dependencies {
+  testImplementation 'io.tmio:tuweni-units'
+
   acceptanceTestImplementation project(":infrastructure:bls")
   acceptanceTestImplementation project(':infrastructure:time')
   acceptanceTestImplementation project(':data:serializer')
diff --git a/build.gradle b/build.gradle
index 7f04f2a384d..e06251b765f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -984,7 +984,6 @@ subprojects {
     runtimeOnly 'org.apache.logging.log4j:log4j-core'
     runtimeOnly 'org.apache.logging.log4j:log4j-slf4j-impl'
 
-    testImplementation 'io.tmio:tuweni-junit'
     testImplementation 'org.assertj:assertj-core'
     testImplementation 'org.mockito:mockito-core'
     testImplementation 'org.junit.jupiter:junit-jupiter-api'
diff --git a/eth-reference-tests/build.gradle b/eth-reference-tests/build.gradle
index 91cb2a10c90..6ebc8cf2cba 100644
--- a/eth-reference-tests/build.gradle
+++ b/eth-reference-tests/build.gradle
@@ -25,7 +25,6 @@ dependencies {
   referenceTestImplementation 'com.fasterxml.jackson.core:jackson-databind'
   referenceTestImplementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml'
   referenceTestImplementation 'io.tmio:tuweni-bytes'
-  referenceTestImplementation 'io.tmio:tuweni-junit'
   referenceTestImplementation 'io.tmio:tuweni-ssz'
   referenceTestImplementation 'org.xerial.snappy:snappy-java'
 }
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/interop/MockStartDepositGeneratorTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/interop/MockStartDepositGeneratorTest.java
index 44d11829600..1554b3f0ca9 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/interop/MockStartDepositGeneratorTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/interop/MockStartDepositGeneratorTest.java
@@ -16,12 +16,10 @@
 import static java.util.stream.Collectors.toList;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import java.security.Security;
 import java.util.Arrays;
 import java.util.List;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
-import org.bouncycastle.jce.provider.BouncyCastleProvider;
 import org.junit.jupiter.api.Test;
 import tech.pegasys.teku.bls.BLSKeyPair;
 import tech.pegasys.teku.bls.BLSSecretKey;
@@ -60,10 +58,6 @@ class MockStartDepositGeneratorTest {
   private final Spec spec = TestSpecFactory.createDefault();
   private final MockStartDepositGenerator generator = new MockStartDepositGenerator(spec);
 
-  static {
-    Security.addProvider(new BouncyCastleProvider());
-  }
-
   @Test
   public void shouldGenerateDepositData() {
     final List<BLSKeyPair> keyPairs =
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/operations/DepositTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/operations/DepositTest.java
index 5769bfb7860..fe8b1c9fd2d 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/operations/DepositTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/operations/DepositTest.java
@@ -24,15 +24,12 @@
 import java.util.Objects;
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.infrastructure.ssz.SszTestUtils;
 import tech.pegasys.teku.infrastructure.ssz.collections.SszBytes32Vector;
 import tech.pegasys.teku.spec.TestSpecFactory;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 class DepositTest {
   private final DataStructureUtil dataStructureUtil =
       new DataStructureUtil(TestSpecFactory.createDefault());
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/HistoricalBatchTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/HistoricalBatchTest.java
index 3ca75e9921b..4bb6aeaf0a3 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/HistoricalBatchTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/HistoricalBatchTest.java
@@ -18,9 +18,7 @@
 import it.unimi.dsi.fastutil.ints.IntList;
 import java.util.stream.IntStream;
 import org.apache.tuweni.bytes.Bytes;
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.infrastructure.ssz.SszTestUtils;
 import tech.pegasys.teku.infrastructure.ssz.collections.SszMutableBytes32Vector;
 import tech.pegasys.teku.spec.Spec;
@@ -28,7 +26,6 @@
 import tech.pegasys.teku.spec.datastructures.state.HistoricalBatch.HistoricalBatchSchema;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 public class HistoricalBatchTest {
 
   private static final Spec SPEC = TestSpecFactory.createMainnetPhase0();
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateSchemaTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateSchemaTest.java
index 015ac23ba02..353f9bc3ea1 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateSchemaTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateSchemaTest.java
@@ -23,9 +23,7 @@
 import it.unimi.dsi.fastutil.ints.IntList;
 import java.util.List;
 import org.apache.tuweni.bytes.Bytes;
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.infrastructure.ssz.SszTestUtils;
 import tech.pegasys.teku.infrastructure.ssz.schema.SszPrimitiveSchemas;
 import tech.pegasys.teku.infrastructure.ssz.schema.SszVectorSchema;
@@ -40,7 +38,6 @@
 import tech.pegasys.teku.spec.datastructures.state.beaconstate.MutableBeaconState;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 public abstract class AbstractBeaconStateSchemaTest<
     T extends BeaconState, TMutable extends MutableBeaconState> {
 
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateTest.java
index 18421bada2e..3da8c63fd16 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/datastructures/state/beaconstate/common/AbstractBeaconStateTest.java
@@ -15,9 +15,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.infrastructure.unsigned.UInt64;
 import tech.pegasys.teku.spec.Spec;
 import tech.pegasys.teku.spec.config.SpecConfig;
@@ -27,7 +25,6 @@
 import tech.pegasys.teku.spec.schemas.registry.SchemaRegistry;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 public abstract class AbstractBeaconStateTest<
     T extends BeaconState, TMutable extends MutableBeaconState> {
 
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/block/BlockProcessorTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/block/BlockProcessorTest.java
index 4b146409389..96ecf5a5f68 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/block/BlockProcessorTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/block/BlockProcessorTest.java
@@ -21,9 +21,7 @@
 import org.apache.tuweni.bytes.Bytes;
 import org.apache.tuweni.bytes.Bytes32;
 import org.apache.tuweni.bytes.Bytes48;
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.bls.BLSPublicKey;
 import tech.pegasys.teku.bls.BLSSignature;
 import tech.pegasys.teku.infrastructure.ssz.SszList;
@@ -45,7 +43,6 @@
 import tech.pegasys.teku.spec.logic.common.statetransition.exceptions.BlockProcessingException;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 public abstract class BlockProcessorTest {
   protected final Spec spec = createSpec();
   protected final DataStructureUtil dataStructureUtil = new DataStructureUtil(spec);
diff --git a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/util/BeaconStateUtilTest.java b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/util/BeaconStateUtilTest.java
index 93876a268f4..cff95833239 100644
--- a/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/util/BeaconStateUtilTest.java
+++ b/ethereum/spec/src/test/java/tech/pegasys/teku/spec/logic/common/util/BeaconStateUtilTest.java
@@ -17,9 +17,7 @@
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static tech.pegasys.teku.spec.config.SpecConfig.GENESIS_SLOT;
 
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import tech.pegasys.teku.infrastructure.unsigned.UInt64;
 import tech.pegasys.teku.spec.Spec;
 import tech.pegasys.teku.spec.SpecVersion;
@@ -31,7 +29,6 @@
 import tech.pegasys.teku.spec.datastructures.state.beaconstate.BeaconState;
 import tech.pegasys.teku.spec.util.DataStructureUtil;
 
-@ExtendWith(BouncyCastleExtension.class)
 public class BeaconStateUtilTest {
   private final Spec spec = TestSpecFactory.createMinimalPhase0();
   private final DataStructureUtil dataStructureUtil = new DataStructureUtil(spec);
diff --git a/fork-choice-tests/build.gradle b/fork-choice-tests/build.gradle
index 0225812d304..403ffbe49a5 100644
--- a/fork-choice-tests/build.gradle
+++ b/fork-choice-tests/build.gradle
@@ -19,5 +19,4 @@ dependencies {
     integrationTestImplementation 'com.fasterxml.jackson.core:jackson-databind'
     integrationTestImplementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml'
     integrationTestImplementation 'io.tmio:tuweni-bytes'
-    integrationTestImplementation 'io.tmio:tuweni-junit'
 }
diff --git a/fuzz/src/test/java/tech/pegasys/teku/fuzz/FuzzUtilTest.java b/fuzz/src/test/java/tech/pegasys/teku/fuzz/FuzzUtilTest.java
index 3e69f57fc11..4355d4c3002 100644
--- a/fuzz/src/test/java/tech/pegasys/teku/fuzz/FuzzUtilTest.java
+++ b/fuzz/src/test/java/tech/pegasys/teku/fuzz/FuzzUtilTest.java
@@ -22,9 +22,7 @@
 import java.util.List;
 import java.util.Optional;
 import org.apache.tuweni.bytes.Bytes;
-import org.apache.tuweni.junit.BouncyCastleExtension;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 import org.xerial.snappy.Snappy;
 import tech.pegasys.teku.fuzz.input.AttestationFuzzInput;
 import tech.pegasys.teku.fuzz.input.AttesterSlashingFuzzInput;
@@ -69,7 +67,6 @@
 import tech.pegasys.teku.spec.datastructures.state.beaconstate.versions.electra.BeaconStateSchemaElectra;
 import tech.pegasys.teku.spec.schemas.SchemaDefinitionsElectra;
 
-@ExtendWith(BouncyCastleExtension.class)
 class FuzzUtilTest {
 
   private final Spec spec = TestSpecFactory.createMinimalElectra();
diff --git a/gradle/versions.gradle b/gradle/versions.gradle
index c4cfaa95c82..6fa62a2d5f6 100644
--- a/gradle/versions.gradle
+++ b/gradle/versions.gradle
@@ -79,7 +79,6 @@ dependencyManagement {
     dependencySet(group: 'io.tmio', version: '2.4.2') {
       entry 'tuweni-bytes'
       entry 'tuweni-crypto'
-      entry 'tuweni-junit'
       entry 'tuweni-ssz'
       entry 'tuweni-units'
     }
diff --git a/teku/src/main/java/tech/pegasys/teku/Teku.java b/teku/src/main/java/tech/pegasys/teku/Teku.java
index cf4cecff13c..0382fabba3e 100644
--- a/teku/src/main/java/tech/pegasys/teku/Teku.java
+++ b/teku/src/main/java/tech/pegasys/teku/Teku.java
@@ -15,10 +15,8 @@
 
 import java.io.PrintWriter;
 import java.nio.charset.Charset;
-import java.security.Security;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicReference;
-import org.bouncycastle.jce.provider.BouncyCastleProvider;
 import tech.pegasys.teku.bls.impl.blst.BlstLoader;
 import tech.pegasys.teku.cli.BeaconNodeCommand;
 import tech.pegasys.teku.cli.BeaconNodeCommand.StartAction;
@@ -31,7 +29,6 @@ public final class Teku {
   static {
     // Disable libsodium in tuweni Hash because the check for it's presence can be very slow.
     System.setProperty("org.apache.tuweni.crypto.useSodium", "false");
-    Security.addProvider(new BouncyCastleProvider());
   }
 
   public static void main(final String[] args) {