diff --git a/libuavcan/test/transport/dispatcher.cpp b/libuavcan/test/transport/dispatcher.cpp
index e2daa02f63..b33ace4931 100644
--- a/libuavcan/test/transport/dispatcher.cpp
+++ b/libuavcan/test/transport/dispatcher.cpp
@@ -52,7 +52,7 @@ static const uavcan::NodeID SELF_NODE_ID(64);
 
 TEST(Dispatcher, Reception)
 {
-    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 8, uavcan::MemPoolBlockSize> pool;
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> pool;
 
     SystemClockMock clockmock(100);
     CanDriverMock driver(2, clockmock);
diff --git a/libuavcan/test/transport/incoming_transfer.cpp b/libuavcan/test/transport/incoming_transfer.cpp
index 8c52dab8d8..735d0027b6 100644
--- a/libuavcan/test/transport/incoming_transfer.cpp
+++ b/libuavcan/test/transport/incoming_transfer.cpp
@@ -72,7 +72,7 @@ TEST(MultiFrameIncomingTransfer, Basic)
     using uavcan::RxFrame;
     using uavcan::MultiFrameIncomingTransfer;
 
-    NullAllocator poolmgr;                 // We don't need dynamic memory
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> poolmgr;
     uavcan::TransferBufferManager<256> bufmgr(poolmgr);
 
     const RxFrame frame = makeFrame();
diff --git a/libuavcan/test/transport/transfer_receiver.cpp b/libuavcan/test/transport/transfer_receiver.cpp
index f58f21a3d6..878a41a70f 100644
--- a/libuavcan/test/transport/transfer_receiver.cpp
+++ b/libuavcan/test/transport/transfer_receiver.cpp
@@ -74,15 +74,13 @@ const uavcan::TransferBufferManagerKey RxFrameGenerator::DEFAULT_KEY(42, uavcan:
 template <unsigned BufSize>
 struct Context
 {
-    NullAllocator pool;                 // We don't need dynamic memory for this test
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> pool;
     uavcan::TransferReceiver receiver;  // Must be default constructible and copyable
     uavcan::TransferBufferManager<BufSize> bufmgr;
 
     Context() :
         bufmgr(pool)
-    {
-        assert(pool.allocate(1) == NULL);
-    }
+    { }
 
     ~Context()
     {
diff --git a/libuavcan/test/transport/transfer_sender.cpp b/libuavcan/test/transport/transfer_sender.cpp
index 62205c68c1..ff5595e19a 100644
--- a/libuavcan/test/transport/transfer_sender.cpp
+++ b/libuavcan/test/transport/transfer_sender.cpp
@@ -29,7 +29,7 @@ static int sendOne(uavcan::TransferSender& sender, const std::string& data,
 
 TEST(TransferSender, Basic)
 {
-    NullAllocator poolmgr;
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> poolmgr;
 
     SystemClockMock clockmock(100);
     CanDriverMock driver(2, clockmock);
@@ -190,7 +190,7 @@ struct TransferSenderTestLoopbackFrameListener : public uavcan::LoopbackFrameLis
 
 TEST(TransferSender, Loopback)
 {
-    NullAllocator poolmgr;
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> poolmgr;
 
     SystemClockMock clockmock(100);
     CanDriverMock driver(2, clockmock);
@@ -231,7 +231,7 @@ TEST(TransferSender, Loopback)
 
 TEST(TransferSender, PassiveMode)
 {
-    NullAllocator poolmgr;
+    uavcan::PoolAllocator<uavcan::MemPoolBlockSize * 100, uavcan::MemPoolBlockSize> poolmgr;
 
     SystemClockMock clockmock(100);
     CanDriverMock driver(2, clockmock);