diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/CreateChildVaspAccountExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/CreateChildVaspAccountExample.java
index 2b8e94f9..08f1462d 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/CreateChildVaspAccountExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/CreateChildVaspAccountExample.java
@@ -100,7 +100,7 @@ public static void main(String[] args) throws Exception {
                         .addArguments(childAccountArgument, authKeyPrefixArgument, createAllCurrenciesArgument,
                                 initialBalanceArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         SignedTransaction signedTransaction = ImmutableSignedTransaction.builder()
diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/DualAttestationExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/DualAttestationExample.java
index 58281bf1..a73ae561 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/DualAttestationExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/DualAttestationExample.java
@@ -141,7 +141,7 @@ private static void transferFromVaspToVasp(DiemClient client, KeyPair sourceKeyP
                         .typeArguments(asList(Struct.typeTagForCurrency(CURRENCY)))
                         .addArguments(addressArgument, amountArgument, metadataArgument, signatureArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         Signature signature = Signature.signTransaction(transaction, sourceKeyPair.getPrivate());
@@ -184,7 +184,7 @@ private static void rotateDualAttestationInfoForVaspAccount(DiemClient client, K
                         .code(Move.rotateDualAttestationInfo())
                         .addArguments(newUrlArgument, compliancePublicKey)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         Signature signature = Signature.signTransaction(transaction, parentVaspKeyPair.getPrivate());
diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/KeyRotationExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/KeyRotationExample.java
index f7ac8c4f..7e63e57e 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/KeyRotationExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/KeyRotationExample.java
@@ -157,7 +157,7 @@ private static void rotateAuthenticationKey(BCEdDSAPrivateKey privateKey,
                         .code(Move.rotateAuthenticationKey())
                         .addArguments(newAuthenticationKeyArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         SignedTransaction signedTransaction = ImmutableSignedTransaction.builder()
diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/MintExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/MintExample.java
index aad84797..84672d12 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/MintExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/MintExample.java
@@ -37,7 +37,7 @@ public static void main(String[] args) {
         faucet.mint(authenticationKey, 100L * 1_000_000L, CURRENCY);
 
         DiemClient client = DiemClient.builder()
-                .withUrl("https://testnet.diem.com/v1")
+                .withUrl("http://testnet.diem.com/v1")
                 .build();
 
         Wait.until(accountHasPositiveBalance(AccountAddress.fromAuthenticationKey(authenticationKey), client));
diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/TransferExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/TransferExample.java
index dfba2487..bd6b1c83 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/TransferExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/TransferExample.java
@@ -99,7 +99,7 @@ public static void main(String[] args) {
                         .addArguments(addressArgument, amountArgument, metadataArgument,
                                 signatureArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         SignedTransaction signedTransaction = ImmutableSignedTransaction.builder()
diff --git a/jlibra-examples/src/main/java/dev/jlibra/example/TransferMultisigExample.java b/jlibra-examples/src/main/java/dev/jlibra/example/TransferMultisigExample.java
index 2de1cb15..2d1ef9e0 100644
--- a/jlibra-examples/src/main/java/dev/jlibra/example/TransferMultisigExample.java
+++ b/jlibra-examples/src/main/java/dev/jlibra/example/TransferMultisigExample.java
@@ -89,7 +89,7 @@ public static void main(String[] args) throws Exception {
                         .typeArguments(asList(Struct.typeTagForCurrency(CURRENCY)))
                         .addArguments(addressArgument, amountArgument, metadataArgument, signatureArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         Signature signature = Signature.newMultisignature();
diff --git a/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/BatchRequestIntegrationTest.java b/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/BatchRequestIntegrationTest.java
index 95b4d70d..60cd904e 100644
--- a/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/BatchRequestIntegrationTest.java
+++ b/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/BatchRequestIntegrationTest.java
@@ -27,7 +27,7 @@ public class BatchRequestIntegrationTest {
     public void setUp() {
         Security.addProvider(new BouncyCastleProvider());
         client = DiemClient.builder()
-                .withUrl("https://testnet.diem.com/v1")
+                .withUrl("http://testnet.diem.com/v1")
                 .build();
     }
 
diff --git a/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/MultisigTransactionTest.java b/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/MultisigTransactionTest.java
index de9a96a9..7e2dd7f1 100644
--- a/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/MultisigTransactionTest.java
+++ b/jlibra-integration-tests/src/test/java/dev/jlibra/integrationtest/MultisigTransactionTest.java
@@ -59,7 +59,7 @@ public class MultisigTransactionTest {
     public void setUp() {
         Security.addProvider(new BouncyCastleProvider());
         client = DiemClient.builder()
-                .withUrl("https://testnet.diem.com/v1")
+                .withUrl("http://testnet.diem.com/v1")
                 .build();
     }
 
@@ -113,7 +113,7 @@ public void testMultisigTransaction() {
                         .typeArguments(asList(Struct.typeTagForCurrency(CURRENCY)))
                         .addArguments(addressArgument, amountArgument, metadataArgument, signatureArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         Signature signature = createSignature(keyPairs, transaction);
@@ -184,7 +184,7 @@ private void createChildVaspAccount(List<KeyPair> keyPairs, KeyPair childVaspAcc
                         .addArguments(childAccountArgument, authKeyPrefixArgument, createAllCurrenciesArgument,
                                 initialBalanceArgument)
                         .build())
-                .chainId(ChainId.TESTNET)
+                .chainId(ChainId.DEVNET)
                 .build();
 
         Signature signature = createSignature(keyPairs, transaction);