diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 159289c22a4..2cb41dfcae6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3288,6 +3288,8 @@ in modules // {
       imread
     ];
 
+    disabled = stdenv.isi686; # Failing tests
+
     meta = with stdenv.lib; {
       description = "Computer vision package based on numpy";
       homepage = https://readthedocs.org/projects/mahotas/;
@@ -10038,6 +10040,10 @@ in modules // {
 
     buildInputs = with self; [ pexpect ];
 
+    prePatch = ''
+      substituteInPlace setup.py --replace "sympy==0.7.6" "sympy"
+    '';
+
     propagatedBuildInputs = with self; [
       argparse
       cython
@@ -20939,6 +20945,8 @@ in modules // {
       sha256 = "02ili37dbs5mk5f6v3fmi1sji39ymc4zyq44x0abxzr88nc8nh97";
     };
 
+    buildInputs = with self; [ mock nose ];
+
     meta = {
       description = "Python API for the browse feature of Spotify";
       homepage = https://github.com/trygveaa/python-tunigo;