diff -Nru python-cryptography-vectors-3.0/debian/changelog python-cryptography-vectors-3.0/debian/changelog
--- python-cryptography-vectors-3.0/debian/changelog	2020-07-21 08:18:56.000000000 +0000
+++ python-cryptography-vectors-3.0/debian/changelog	2020-08-05 09:58:40.000000000 +0000
@@ -1,3 +1,10 @@
+python-cryptography-vectors (3.0-2) unstable; urgency=medium
+
+  * Add versioned Breaks: on python-cryptography to (hopefully) ease
+    migration to testing.
+
+ -- Tristan Seligmann <mithrandi@debian.org>  Wed, 05 Aug 2020 11:58:40 +0200
+
 python-cryptography-vectors (3.0-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru python-cryptography-vectors-3.0/debian/control python-cryptography-vectors-3.0/debian/control
--- python-cryptography-vectors-3.0/debian/control	2020-07-21 08:18:56.000000000 +0000
+++ python-cryptography-vectors-3.0/debian/control	2020-08-05 09:58:40.000000000 +0000
@@ -18,6 +18,7 @@
 Package: python3-cryptography-vectors
 Architecture: all
 Depends: ${misc:Depends}, ${python3:Depends}, ${shlibs:Depends}
+Breaks: python3-cryptography (<< 3.0~), python3-cryptography (>= 3.0.1~)
 Description: Test vectors for python-cryptography (Python 3)
  The test vectors for the cryptography library are rather large; thus, they are
  broken out into their own package so that users who do not need to run the