diff --git a/test/implementations/onblocks/BlobOnBlocksTest.cpp b/test/implementations/onblocks/BlobOnBlocksTest.cpp
deleted file mode 100644
index 6c1f17a4..00000000
--- a/test/implementations/onblocks/BlobOnBlocksTest.cpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "testutils/BlobStoreTest.h"
-
-class BlobOnBlocksTest: public BlobStoreTest {};
-
-TEST_F(BlobOnBlocksTest, CreatedBlobIsEmpty) {
-  auto blob = blobStore->create();
-  EXPECT_EQ(0, blob->size());
-}
diff --git a/test/implementations/onblocks/BlobResizeTest.cpp b/test/implementations/onblocks/BlobResizeTest.cpp
new file mode 100644
index 00000000..6a10fdbb
--- /dev/null
+++ b/test/implementations/onblocks/BlobResizeTest.cpp
@@ -0,0 +1,58 @@
+#include "testutils/BlobStoreTest.h"
+
+using std::unique_ptr;
+
+using namespace blobstore;
+
+class BlobResizeTest: public BlobStoreTest {
+public:
+  BlobResizeTest(): blob(blobStore->create()) {}
+
+  static constexpr uint32_t LARGE_SIZE = 10 * 1024 * 1024;
+
+  unique_ptr<Blob> blob;
+};
+constexpr uint32_t BlobResizeTest::LARGE_SIZE;
+
+TEST_F(BlobResizeTest, CreatedBlobIsEmpty) {
+  EXPECT_EQ(0, blob->size());
+}
+
+TEST_F(BlobResizeTest, Growing_1Byte) {
+  blob->resize(1);
+  EXPECT_EQ(1, blob->size());
+}
+
+TEST_F(BlobResizeTest, Growing_Large) {
+  blob->resize(LARGE_SIZE);
+  EXPECT_EQ(LARGE_SIZE, blob->size());
+}
+
+TEST_F(BlobResizeTest, Shrinking_Empty) {
+  blob->resize(LARGE_SIZE);
+  blob->resize(0);
+  EXPECT_EQ(0, blob->size());
+}
+
+TEST_F(BlobResizeTest, Shrinking_1Byte) {
+  blob->resize(LARGE_SIZE);
+  blob->resize(1);
+  EXPECT_EQ(1, blob->size());
+}
+
+TEST_F(BlobResizeTest, ResizingToItself_Empty) {
+  blob->resize(0);
+  EXPECT_EQ(0, blob->size());
+}
+
+TEST_F(BlobResizeTest, ResizingToItself_1Byte) {
+  blob->resize(1);
+  blob->resize(1);
+  EXPECT_EQ(1, blob->size());
+}
+
+TEST_F(BlobResizeTest, ResizingToItself_Large) {
+  blob->resize(LARGE_SIZE);
+  blob->resize(LARGE_SIZE);
+  EXPECT_EQ(LARGE_SIZE, blob->size());
+}
diff --git a/test/implementations/onblocks/testutils/BlobStoreTest.h b/test/implementations/onblocks/testutils/BlobStoreTest.h
index e5e5c5e7..d81a9369 100644
--- a/test/implementations/onblocks/testutils/BlobStoreTest.h
+++ b/test/implementations/onblocks/testutils/BlobStoreTest.h
@@ -6,7 +6,7 @@ class BlobStoreTest: public ::testing::Test {
 public:
   BlobStoreTest();
 
-  static constexpr uint32_t BLOCKSIZE_BYTES = 256;
+  static constexpr uint32_t BLOCKSIZE_BYTES = 4096;
 
   std::unique_ptr<blobstore::BlobStore> blobStore;
 };