diff --git a/test/firmware_state_uploadinprogress_unittest.cpp b/test/firmware_state_uploadinprogress_unittest.cpp
index 6b0394a..d5d929f 100644
--- a/test/firmware_state_uploadinprogress_unittest.cpp
+++ b/test/firmware_state_uploadinprogress_unittest.cpp
@@ -18,6 +18,7 @@
 {
 
 using ::testing::ContainerEq;
+using ::testing::IsEmpty;
 using ::testing::Return;
 using ::testing::UnorderedElementsAreArray;
 
@@ -273,6 +274,12 @@
 /*
  * read(session)
  */
+TEST_F(FirmwareHandlerUploadInProgressTest, ReadImageFileReturnsFailure)
+{
+    /* Read is not supported. */
+    openToInProgress(staticLayoutBlobId);
+    EXPECT_THAT(handler->read(session, 0, 32), IsEmpty());
+}
 
 /*
  * commit(session)