diff --git a/.changelog/1182.internal.md b/.changelog/1182.internal.md
new file mode 100644
index 000000000..c2b42d61e
--- /dev/null
+++ b/.changelog/1182.internal.md
@@ -0,0 +1 @@
+Update Testnet Sapphire block gas limit
diff --git a/src/config.ts b/src/config.ts
index fd34bcf02..37073c85a 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -85,14 +85,15 @@ const sapphireConfig: LayerConfig = {
   mainnet: {
     activeNodes: 41,
     address: 'oasis1qrd3mnzhhgst26hsp96uf45yhq6zlax0cuzdgcfc',
-    // See max_batch_gas https://github.com/oasisprotocol/sapphire-paratime/blob/5cbcdf764390bba3ae27411c551a4f4444117f3f/runtime/src/lib.rs#L146
+    // See max_batch_gas https://github.com/oasisprotocol/sapphire-paratime/blob/main/runtime/src/lib.rs#L166
     blockGasLimit: 15_000_000,
     runtimeId: '000000000000000000000000000000000000000000000000f80306c9858e7279',
   },
   testnet: {
     activeNodes: 21,
     address: 'oasis1qqczuf3x6glkgjuf0xgtcpjjw95r3crf7y2323xd',
-    blockGasLimit: 30_000_000,
+    // See max_batch_gas https://github.com/oasisprotocol/sapphire-paratime/blob/main/runtime/src/lib.rs#L166
+    blockGasLimit: 15_000_000,
     runtimeId: '000000000000000000000000000000000000000000000000a6d1e3ebf60dff6c',
   },
   local: {