diff --git a/host/lib/update_payload/checker.py b/host/lib/update_payload/checker.py
index 0bc62ad..48b18e6 100644
--- a/host/lib/update_payload/checker.py
+++ b/host/lib/update_payload/checker.py
@@ -494,6 +494,34 @@
           '%s (%d) <= (num %sblocks - 1 (%d)) * block_size (%d).' %
           (length_name, length, block_name or '', num_blocks - 1, block_size))
 
+  def _CheckMinorVersion(self, report, minor_version, payload_type):
+    """Checks that the minor version matches the payload type.
+
+    Args:
+      report: The report object to add to.
+      minor_version: The minor version of the payload.
+      payload_type: The type of payload (full or delta).
+
+    Raises:
+      error.PayloadError if any of the checks fails.
+    """
+    report.AddField('minor version', minor_version)
+
+    if minor_version == 0:
+      # Minor version 0 implies a full payload.
+      if payload_type != _TYPE_FULL:
+        raise error.PayloadError(
+            'Minor version 0 not compatible with payload type: %s.'
+            % payload_type)
+    elif minor_version in (1, 2):
+      # Minor version 1 or 2 implies a delta payload.
+      if payload_type != _TYPE_DELTA:
+        raise error.PayloadError(
+            'Minor version %d not compatible with payload type: %s.'
+            % (minor_version, payload_type))
+    else:
+      raise error.PayloadError('Unsupported minor version: %d' % minor_version)
+
   def _CheckManifest(self, report, rootfs_part_size=0, kernel_part_size=0):
     """Checks the payload manifest.
 
@@ -802,7 +830,6 @@
     """Specific checks for SOURCE_COPY.
 
     Args:
-      op: The operation object from the manifest.
       data_offset: The offset of a data blob for the operation.
       total_src_blocks: Total number of blocks in src_extents.
       total_dst_blocks: Total number of blocks in dst_extents.
@@ -908,22 +935,23 @@
             (op_name, data_offset, prev_data_offset))
 
     # Type-specific checks.
+    minor_version = self.payload.manifest.minor_version
     if op.type in (common.OpType.REPLACE, common.OpType.REPLACE_BZ):
       self._CheckReplaceOperation(op, data_length, total_dst_blocks, op_name)
-    elif self.payload_type == _TYPE_FULL:
-      raise error.PayloadError('%s: non-REPLACE operation in a full payload.' %
-                               op_name)
-    elif op.type == common.OpType.MOVE:
+    elif op.type == common.OpType.MOVE and minor_version == 1:
       self._CheckMoveOperation(op, data_offset, total_src_blocks,
                                total_dst_blocks, op_name)
-    elif op.type in (common.OpType.BSDIFF, common.OpType.SOURCE_BSDIFF):
+    elif op.type == common.OpType.BSDIFF and minor_version == 1:
       self._CheckBsdiffOperation(data_length, total_dst_blocks, op_name)
-    elif op.type == common.OpType.SOURCE_COPY:
+    elif op.type == common.OpType.SOURCE_COPY and minor_version == 2:
       self._CheckSourceCopyOperation(data_offset, total_src_blocks,
                                      total_dst_blocks, op_name)
+    elif op.type == common.OpType.SOURCE_BSDIFF and minor_version == 2:
+      self._CheckBsdiffOperation(data_length, total_dst_blocks, op_name)
     else:
-      assert False, 'cannot get here'
-
+      raise error.PayloadError(
+          'Operation %s (type %d) not allowed in minor version %d' %
+          (op_name, op.type, minor_version))
     return data_length if data_length is not None else 0
 
   def _SizeToNumBlocks(self, size):
@@ -1056,19 +1084,6 @@
           '%s: not all blocks written exactly once during full update.' %
           base_name)
 
-    # Check: SOURCE_COPY and SOURCE_BSDIFF ops shouldn't be in minor version 1.
-    if (self.payload.manifest.minor_version == 1 and
-        (op_counts[common.OpType.SOURCE_COPY] or
-         op_counts[common.OpType.SOURCE_BSDIFF])):
-      raise error.PayloadError(
-          'SOURCE_COPY/SOURCE_BSDIFF not allowed with minor version 1.')
-
-    # Check: MOVE and BSDIFF ops shouldn't be in minor version 2.
-    if (self.payload.manifest.minor_version == 2 and
-        (op_counts[common.OpType.MOVE] or op_counts[common.OpType.BSDIFF])):
-      raise error.PayloadError(
-          'MOVE/BSDIFF not allowed with minor version 2.')
-
     return total_data_used
 
   def _CheckSignatures(self, report, pubkey_file_name):
@@ -1122,36 +1137,6 @@
         raise error.PayloadError('Unknown signature version (%d).' %
                                  sig.version)
 
-  def _CheckMinorVersion(self, report, minor_version, payload_type):
-    """Checks that the minor version matches the payload type.
-
-    Args:
-      report: The report object to add to.
-      minor_version: The minor version of the payload.
-      payload_type: The type of payload (full or delta).
-
-    Raises:
-      error.PayloadError if any of the checks fails.
-    """
-    report.AddField('minor version', minor_version)
-
-    # Minor version 0 implies a full payload.
-    if minor_version == 0:
-      if payload_type != _TYPE_FULL:
-        raise error.PayloadError(
-            'Minor version 0 not compatible with payload type: %s.'
-            % payload_type)
-
-    # Minor version 1 or 2 implies a delta payload.
-    elif minor_version == 1 or minor_version == 2:
-      if payload_type != _TYPE_DELTA:
-        raise error.PayloadError(
-            'Minor version %d not compatible with payload type: %s.'
-            % (minor_version, payload_type))
-
-    else:
-      raise error.PayloadError('Unsupported minor version: %d' % minor_version)
-
   def Run(self, pubkey_file_name=None, metadata_sig_file=None,
           rootfs_part_size=0, kernel_part_size=0, report_out_file=None):
     """Checker entry point, invoking all checks.
diff --git a/host/lib/update_payload/checker_unittest.py b/host/lib/update_payload/checker_unittest.py
index 442fcaa..c07819a 100755
--- a/host/lib/update_payload/checker_unittest.py
+++ b/host/lib/update_payload/checker_unittest.py
@@ -782,7 +782,7 @@
                            fail_mismatched_data_offset_length,
                            fail_missing_dst_extents, fail_src_length,
                            fail_dst_length, fail_data_hash,
-                           fail_prev_data_offset):
+                           fail_prev_data_offset, fail_bad_minor_version):
     """Parametric testing of _CheckOperation().
 
     Args:
@@ -800,6 +800,7 @@
       fail_dst_length: Make dst length inconsistent.
       fail_data_hash: Tamper with the data blob hash.
       fail_prev_data_offset: Make data space uses incontiguous.
+      fail_bad_minor_version: Make minor version incompatible with op.
     """
     op_type = _OpTypeByName(op_type_name)
 
@@ -834,6 +835,13 @@
                           self.NewExtentList((0, 16)))
         total_src_blocks = 16
 
+    if op_type in (common.OpType.REPLACE, common.OpType.REPLACE_BZ):
+      payload.manifest.minor_version = 0
+    elif op_type in (common.OpType.MOVE, common.OpType.BSDIFF):
+      payload.manifest.minor_version = 2 if fail_bad_minor_version else 1
+    elif op_type in (common.OpType.SOURCE_COPY, common.OpType.SOURCE_BSDIFF):
+      payload.manifest.minor_version = 1 if fail_bad_minor_version else 2
+
     if op_type not in (common.OpType.MOVE, common.OpType.SOURCE_COPY):
       if not fail_mismatched_data_offset_length:
         op.data_length = 16 * block_size - 8
@@ -886,7 +894,8 @@
     should_fail = (fail_src_extents or fail_dst_extents or
                    fail_mismatched_data_offset_length or
                    fail_missing_dst_extents or fail_src_length or
-                   fail_dst_length or fail_data_hash or fail_prev_data_offset)
+                   fail_dst_length or fail_data_hash or fail_prev_data_offset or
+                   fail_bad_minor_version)
     args = (op, 'foo', is_last, old_block_counters, new_block_counters,
             old_part_size, new_part_size, prev_data_offset, allow_signature,
             blob_hash_counts)
@@ -959,54 +968,6 @@
       self.assertEqual(rootfs_data_length,
                        payload_checker._CheckOperations(*args))
 
-  def testCheckOperationsMinorVersion(self):
-    """Tests _CheckOperations; checks op compatibility with minor version.
-
-       SOURCE_COPY and SOURCE_BSDIFF operations are not supported in payloads
-       with delta minor version 1. MOVE and BSDIFF operations are not supported
-       in payloads with delta minor version 2.
-    """
-    # Create test objects and parameters.
-    payload_checker = checker.PayloadChecker(self.MockPayload())
-    report = checker._PayloadReport()
-    rootfs_part_size = test_utils.MiB(8)
-
-    FakeOp = collections.namedtuple('FakeOp', ['type'])
-    args = ([FakeOp(common.OpType.SOURCE_COPY),
-             FakeOp(common.OpType.SOURCE_BSDIFF)],
-            report, 'foo', 0, rootfs_part_size, rootfs_part_size, 0, False)
-
-    try:
-      # Mock _CheckOperation() so it will pass.
-      self.mox.StubOutWithMock(payload_checker, '_CheckOperation')
-      payload_checker._CheckOperation(mox.IgnoreArg(), mox.IgnoreArg(),
-                                      mox.IgnoreArg(), mox.IgnoreArg(),
-                                      mox.IgnoreArg(), mox.IgnoreArg(),
-                                      mox.IgnoreArg(), mox.IgnoreArg(),
-                                      mox.IgnoreArg(), mox.IgnoreArg()
-                                     ).MultipleTimes().AndReturn(0)
-      self.mox.ReplayAll()
-
-      # Fail, minor version 1 should not allow SOURCE_COPY or SOURCE_BSDIFF.
-      payload_checker.payload.manifest.minor_version = 1
-      self.assertRaises(update_payload.PayloadError,
-                        payload_checker._CheckOperations,
-                        *args)
-
-      # Pass, minor version 2 should allow these operations.
-      payload_checker.payload.manifest.minor_version = 2
-      self.assertEquals(payload_checker._CheckOperations(*args), 0)
-
-      # Fail, minor version 2 should not allow MOVE or BSDIFF.
-      args = ([FakeOp(common.OpType.MOVE), FakeOp(common.OpType.BSDIFF)],
-              report, 'foo', 0, rootfs_part_size, rootfs_part_size, 0, False)
-      self.assertRaises(update_payload.PayloadError,
-                        payload_checker._CheckOperations,
-                        *args)
-
-    finally:
-      self.mox.UnsetStubs()
-
   def DoCheckSignaturesTest(self, fail_empty_sigs_blob, fail_missing_pseudo_op,
                             fail_mismatched_pseudo_op, fail_sig_missing_fields,
                             fail_unknown_sig_version, fail_incorrect_sig):
@@ -1167,13 +1128,14 @@
                                fail_mismatched_data_offset_length,
                                fail_missing_dst_extents, fail_src_length,
                                fail_dst_length, fail_data_hash,
-                               fail_prev_data_offset):
+                               fail_prev_data_offset, fail_bad_minor_version):
   """Returns True iff the combination of arguments represents a valid test."""
   op_type = _OpTypeByName(op_type_name)
 
-  # REPLACE/REPLACE_BZ operations don't read data from src partition.
+  # REPLACE/REPLACE_BZ operations don't read data from src partition. They are
+  # compatible with all valid minor versions, so we don't need to check that.
   if (op_type in (common.OpType.REPLACE, common.OpType.REPLACE_BZ) and (
-      fail_src_extents or fail_src_length)):
+      fail_src_extents or fail_src_length or fail_bad_minor_version)):
     return False
 
   # MOVE and SOURCE_COPY operations don't carry data.
@@ -1272,7 +1234,8 @@
                       'fail_src_length': (True, False),
                       'fail_dst_length': (True, False),
                       'fail_data_hash': (True, False),
-                      'fail_prev_data_offset': (True, False)},
+                      'fail_prev_data_offset': (True, False),
+                      'fail_bad_minor_version': (True, False)},
                      validate_func=ValidateCheckOperationTest)
 
   # Add all _CheckOperations() test cases.