diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index 2d92638af4f3..607e431b39c8 100644
--- a/pkgs/development/python-modules/cryptography/default.nix
+++ b/pkgs/development/python-modules/cryptography/default.nix
@@ -1,11 +1,11 @@
 { lib
 , stdenv
+, callPackage
 , buildPythonPackage
 , fetchPypi
 , rustPlatform
 , setuptools-rust
 , openssl
-, cryptography_vectors
 , Security
 , packaging
 , six
@@ -20,6 +20,9 @@
 , hypothesis
 }:
 
+let
+  cryptography-vectors = callPackage ./vectors.nix { };
+in
 buildPythonPackage rec {
   pname = "cryptography";
   version = "36.0.2"; # Also update the hash in vectors.nix
@@ -55,7 +58,7 @@ buildPythonPackage rec {
   ];
 
   checkInputs = [
-    cryptography_vectors
+    cryptography-vectors
     hypothesis
     iso8601
     pretend
diff --git a/pkgs/development/python-modules/cryptography/vectors.nix b/pkgs/development/python-modules/cryptography/vectors.nix
index 5c7e54fc59fc..993720907265 100644
--- a/pkgs/development/python-modules/cryptography/vectors.nix
+++ b/pkgs/development/python-modules/cryptography/vectors.nix
@@ -1,12 +1,13 @@
 { buildPythonPackage, fetchPypi, lib, cryptography }:
 
 buildPythonPackage rec {
-  pname = "cryptography_vectors";
-  # The test vectors must have the same version as the cryptography package:
+  pname = "cryptography-vectors";
+  # The test vectors must have the same version as the cryptography package
   inherit (cryptography) version;
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "cryptography_vectors";
+    inherit version;
     sha256 = "sha256-KnkkRJoDAl+vf4dUpvQgAAHKshBzSmzmrB9r2s06aOQ=";
   };
 
diff --git a/pkgs/development/python2-modules/cryptography/default.nix b/pkgs/development/python2-modules/cryptography/default.nix
index 357bb35dacf7..0b4e2ae394cd 100644
--- a/pkgs/development/python2-modules/cryptography/default.nix
+++ b/pkgs/development/python2-modules/cryptography/default.nix
@@ -1,10 +1,11 @@
-{ lib, stdenv
+{ lib
+, stdenv
+, callPackage
 , buildPythonPackage
 , fetchPypi
 , isPy27
 , ipaddress
 , openssl
-, cryptography_vectors
 , darwin
 , packaging
 , six
@@ -18,6 +19,9 @@
 , enum34
 }:
 
+let
+  cryptography-vectors = callPackage ./vectors.nix { };
+in
 buildPythonPackage rec {
   pname = "cryptography";
   version = "3.3.2"; # Also update the hash in vectors-3.3.nix
@@ -36,18 +40,19 @@ buildPythonPackage rec {
   ];
 
   buildInputs = [ openssl ]
-             ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
   propagatedBuildInputs = [
     packaging
     six
   ] ++ lib.optionals (!isPyPy) [
     cffi
   ] ++ lib.optionals isPy27 [
-    ipaddress enum34
+    ipaddress
+    enum34
   ];
 
   checkInputs = [
-    cryptography_vectors
+    cryptography-vectors
     hypothesis
     iso8601
     pretend
diff --git a/pkgs/development/python2-modules/cryptography-vectors/default.nix b/pkgs/development/python2-modules/cryptography/vectors.nix
similarity index 87%
rename from pkgs/development/python2-modules/cryptography-vectors/default.nix
rename to pkgs/development/python2-modules/cryptography/vectors.nix
index f9b7c525237a..4d6214807e73 100644
--- a/pkgs/development/python2-modules/cryptography-vectors/default.nix
+++ b/pkgs/development/python2-modules/cryptography/vectors.nix
@@ -1,12 +1,13 @@
 { buildPythonPackage, fetchPypi, lib, cryptography }:
 
 buildPythonPackage rec {
-  pname = "cryptography_vectors";
+  pname = "cryptography-vectors";
   # The test vectors must have the same version as the cryptography package:
   version = cryptography.version;
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "cryptography_vectors";
+    inherit version;
     sha256 = "1yhaps0f3h2yjb6lmz953z1l1d84y9swk4k3gj9nqyk4vbx5m7cc";
   };
 
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 05ebce6357c6..54130c5b3549 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -43,6 +43,7 @@ mapAliases ({
   class-registry = phx-class-registry; # added 2021-10-05
   ConfigArgParse = configargparse; # added 2021-03-18
   cozy = throw "cozy was removed because it was not actually https://pypi.org/project/Cozy/."; # added 2022-01-14
+  cryptography_vectors = "cryptography_vectors is no longer exposed in python*Packages because it is used for testing cryptography only."; # Added 2022-03-23
   dateutil = python-dateutil; # added 2021-07-03
   demjson = throw "demjson has been removed, it was using setuptools 2to3 translation feature, which has been removed in setuptools 58"; # added 2022-01-18
   detox = throw "detox is no longer maintained, and was broken since may 2019"; # added 2020-07-04
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index babaf1f3d35a..d5735ff24980 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1920,8 +1920,6 @@ in {
     inherit (pkgs.darwin.apple_sdk.frameworks) Security;
   };
 
-  cryptography_vectors = callPackage ../development/python-modules/cryptography/vectors.nix { };
-
   crytic-compile = callPackage ../development/python-modules/crytic-compile { };
 
   csrmesh  = callPackage ../development/python-modules/csrmesh { };
diff --git a/pkgs/top-level/python2-packages.nix b/pkgs/top-level/python2-packages.nix
index 224acec1625f..c915fc5c8c50 100644
--- a/pkgs/top-level/python2-packages.nix
+++ b/pkgs/top-level/python2-packages.nix
@@ -30,8 +30,6 @@ with self; with super; {
 
   cryptography = callPackage ../development/python2-modules/cryptography { };
 
-  cryptography_vectors = callPackage ../development/python2-modules/cryptography-vectors { };
-
   decorator = callPackage ../development/python2-modules/decorator { };
 
   enum = callPackage ../development/python2-modules/enum { };