diff --git a/system/t04_mirror/UpdateMirror16Test_gold b/system/t04_mirror/UpdateMirror16Test_gold
new file mode 100644
index 00000000..3c11f1ff
--- /dev/null
+++ b/system/t04_mirror/UpdateMirror16Test_gold
@@ -0,0 +1,9 @@
+
+
+Building download queue...
+Download queue: 1 items (2.67 KiB)
+Downloading & parsing package files...
+Downloading https://dl.bintray.com/smira/deb/Packages.bz2...
+Downloading https://dl.bintray.com/smira/deb/Release...
+Downloading https://dl.bintray.com/smira/deb/libboost-program-options-dev_1.49.0.1_i386.deb...
+Mirror `bintray` has been successfully updated.
\ No newline at end of file
diff --git a/system/t04_mirror/UpdateMirror17Test_gold b/system/t04_mirror/UpdateMirror17Test_gold
new file mode 100644
index 00000000..cf10e132
--- /dev/null
+++ b/system/t04_mirror/UpdateMirror17Test_gold
@@ -0,0 +1,10 @@
+
+
+Applying filter...
+Building download queue...
+Download queue: 0 items (0 B)
+Downloading & parsing package files...
+Downloading http://mirror.yandex.ru/debian/dists/wheezy/Release...
+Downloading http://mirror.yandex.ru/debian/dists/wheezy/main/binary-i386/Packages.bz2...
+Mirror `wheezy` has been successfully updated.
+Packages filtered: 36024 -> 1.
\ No newline at end of file
diff --git a/system/t04_mirror/update.py b/system/t04_mirror/update.py
index 8e2cf494..15edcc36 100644
--- a/system/t04_mirror/update.py
+++ b/system/t04_mirror/update.py
@@ -1,5 +1,8 @@
 import string
 import re
+import os
+import shutil
+import inspect
 from lib import BaseTest
 
 
@@ -220,3 +223,59 @@ class UpdateMirror15Test(BaseTest):
         super(UpdateMirror15Test, self).check()
         # check pool
         self.check_exists('pool/c7/6b/4bd12fd92e4dfe1b55b18a67a669_libboost-program-options-dev_1.49.0.1_i386.deb')
+
+
+class UpdateMirror16Test(BaseTest):
+    """
+    update mirrors: update for mirror without MD5 checksums but with file in pool on legacy MD5 location
+
+    as mirror lacks MD5 checksum, file would be downloaded but not re-imported
+    """
+    longTest = False
+    fixtureCmds = [
+        "aptly mirror create --ignore-signatures bintray https://dl.bintray.com/smira/deb/ ./",
+    ]
+    runCmd = "aptly mirror update --ignore-signatures bintray"
+
+    def output_processor(self, output):
+        return "\n".join(sorted(output.split("\n")))
+
+    def prepare(self):
+        super(UpdateMirror16Test, self).prepare()
+
+        os.makedirs(os.path.join(os.environ["HOME"], ".aptly", "pool", "00", "35"))
+
+        shutil.copy(os.path.join(os.path.dirname(inspect.getsourcefile(BaseTest)), "files", "libboost-program-options-dev_1.49.0.1_i386.deb"),
+                    os.path.join(os.environ["HOME"], ".aptly", "pool", "00", "35"))
+
+    def check(self):
+        super(UpdateMirror16Test, self).check()
+        # check pool
+        self.check_not_exists('pool/c7/6b/4bd12fd92e4dfe1b55b18a67a669_libboost-program-options-dev_1.49.0.1_i386.deb')
+
+
+class UpdateMirror17Test(BaseTest):
+    """
+    update mirrors: update for mirror but with file in pool on legacy MD5 location
+    """
+    longTest = False
+    fixtureCmds = [
+        "aptly mirror create -ignore-signatures -architectures=i386 -filter=libboost-program-options-dev wheezy http://mirror.yandex.ru/debian wheezy main",
+    ]
+    runCmd = "aptly mirror update -ignore-signatures wheezy"
+
+    def output_processor(self, output):
+        return "\n".join(sorted(output.split("\n")))
+
+    def prepare(self):
+        super(UpdateMirror17Test, self).prepare()
+
+        os.makedirs(os.path.join(os.environ["HOME"], ".aptly", "pool", "00", "35"))
+
+        shutil.copy(os.path.join(os.path.dirname(inspect.getsourcefile(BaseTest)), "files", "libboost-program-options-dev_1.49.0.1_i386.deb"),
+                    os.path.join(os.environ["HOME"], ".aptly", "pool", "00", "35"))
+
+    def check(self):
+        super(UpdateMirror17Test, self).check()
+        # check pool
+        self.check_not_exists('pool/c7/6b/4bd12fd92e4dfe1b55b18a67a669_libboost-program-options-dev_1.49.0.1_i386.deb')