diff --git a/gnu/local.mk b/gnu/local.mk
index 7fa7e7d818..1957fb66cb 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -641,7 +641,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/e2fsprogs-glibc-2.27.patch		\
   %D%/packages/patches/eigen-arm-neon-fixes.patch		\
   %D%/packages/patches/elfutils-tests-ptrace.patch		\
-  %D%/packages/patches/elixir-disable-failing-tests.patch	\
   %D%/packages/patches/elogind-glibc-2.27.patch			\
   %D%/packages/patches/einstein-build.patch			\
   %D%/packages/patches/emacs-browse-at-remote-cgit-gnu.patch	\
diff --git a/gnu/packages/elixir.scm b/gnu/packages/elixir.scm
index ceabc2a6c4..ed6bd00236 100644
--- a/gnu/packages/elixir.scm
+++ b/gnu/packages/elixir.scm
@@ -40,15 +40,7 @@
               (file-name (string-append name "-" version ".tar.gz"))
               (sha256
                (base32
-                "0acnxfwvkx1m1d0h5z051mz95n35zm468hcvc3wpmn17c15h5ihg"))
-              ;; FIXME: 27 tests (out of 4K) had to be disabled as
-              ;; they fail in the build environment.  Common failures
-              ;; are:
-              ;; - Mix.Shell.cmd() fails with error 130
-              ;; - The git_repo fixture cannot be found
-              ;; - Communication with spawned processes fails with EPIPE
-              ;; - Failure to copy files
-              (patches (search-patches "elixir-disable-failing-tests.patch"))))
+                "0acnxfwvkx1m1d0h5z051mz95n35zm468hcvc3wpmn17c15h5ihg"))))
     (build-system gnu-build-system)
     (arguments
      `(#:test-target "test"
@@ -70,27 +62,6 @@
                  (("#!/usr/bin/env elixir")
                   (string-append "#!" out "/bin/elixir"))))
              #t))
-         (add-after 'unpack 'fix-or-disable-tests
-           (lambda* (#:key inputs #:allow-other-keys)
-             ;; Some tests require access to a home directory.
-             (setenv "HOME" "/tmp")
-
-             ;; FIXME: These tests fail because the "git_repo" fixture does
-             ;; not exist or cannot be found.
-             (delete-file "lib/mix/test/mix/tasks/deps.git_test.exs")
-
-             ;; FIXME: Mix.Shell.cmd() always fails with error code 130.
-             (delete-file "lib/mix/test/mix/shell_test.exs")
-
-             ;; FIXME:
-             ;; disabled failing impure tests to make it build again.
-             ;; related discussion: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28034#14
-             (delete-file "lib/elixir/test/elixir/kernel/cli_test.exs")
-             (delete-file "lib/elixir/test/elixir/kernel/dialyzer_test.exs")
-             (delete-file "lib/iex/test/iex/helpers_test.exs")
-             (delete-file "lib/ex_unit/test/ex_unit/capture_io_test.exs")
-
-             #t))
          (add-before 'build 'make-current
            ;; The Elixir compiler checks whether or not to compile files by
            ;; inspecting their timestamps.  When the timestamp is equal to the
@@ -102,6 +73,11 @@
                            (utime file recent recent 0 0)))
                        (find-files "." ".*"))
              #t))
+         (add-before 'check 'set-home
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; Some tests require access to a home directory.
+             (setenv "HOME" "/tmp")
+             #t))
          (delete 'configure))))
     (inputs
      `(("erlang" ,erlang)
diff --git a/gnu/packages/patches/elixir-disable-failing-tests.patch b/gnu/packages/patches/elixir-disable-failing-tests.patch
deleted file mode 100644
index 547598b292..0000000000
--- a/gnu/packages/patches/elixir-disable-failing-tests.patch
+++ /dev/null
@@ -1,284 +0,0 @@
-Most of these tests fail for unknown reasons when run in the chroot
-environment of a Guix build process.
-
-Common failures are:
-
- * Mix.Shell.cmd() fails with error 130
- * The git_repo fixture cannot be found
- * Communication with spawned processes fails with EPIPE
- * Failure to copy files
-
-
-diff --git a/lib/elixir/test/elixir/kernel/cli_test.exs b/lib/elixir/test/elixir/kernel/cli_test.exs
-index 3ffd56c..1232d19 100644
---- a/lib/elixir/test/elixir/kernel/cli_test.exs
-+++ b/lib/elixir/test/elixir/kernel/cli_test.exs
-@@ -39,6 +39,7 @@ end
- defmodule Kernel.CLI.OptionParsingTest do
-   use ExUnit.Case, async: true
-
-+  @tag :skip
-   test "properly parses paths" do
-     root = fixture_path("../../..") |> to_charlist
-     list = elixir('-pa "#{root}/*" -pz "#{root}/lib/*" -e "IO.inspect(:code.get_path, limit: :infinity)"')
-@@ -57,6 +58,7 @@ end
- defmodule Kernel.CLI.AtExitTest do
-   use ExUnit.Case, async: true
-
-+  @tag :skip
-   test "invokes at_exit callbacks" do
-     assert elixir(fixture_path("at_exit.exs") |> to_charlist) ==
-            'goodbye cruel world with status 1\n'
-@@ -66,6 +68,7 @@ end
- defmodule Kernel.CLI.ErrorTest do
-   use ExUnit.Case, async: true
-
-+  @tag :skip
-   test "properly format errors" do
-     assert :string.str('** (throw) 1', elixir('-e "throw 1"')) == 0
-     assert :string.str('** (ErlangError) erlang error: 1', elixir('-e "error 1"')) == 0
-@@ -86,6 +89,7 @@ defmodule Kernel.CLI.CompileTest do
-     {:ok, [tmp_dir_path: tmp_dir_path, beam_file_path: beam_file_path, fixture: fixture]}
-   end
-
-+  @tag :skip
-   test "compiles code", context do
-     assert elixirc('#{context[:fixture]} -o #{context[:tmp_dir_path]}') == ''
-     assert File.regular?(context[:beam_file_path])
-@@ -96,6 +100,7 @@ defmodule Kernel.CLI.CompileTest do
-     Code.delete_path context[:tmp_dir_path]
-   end
-
-+  @tag :skip
-   test "fails on missing patterns", context do
-     output = elixirc('#{context[:fixture]} non_existing.ex -o #{context[:tmp_dir_path]}')
-     assert :string.str(output, 'non_existing.ex') > 0, "expected non_existing.ex to be mentioned"
-@@ -103,6 +108,7 @@ defmodule Kernel.CLI.CompileTest do
-     refute File.exists?(context[:beam_file_path]), "expected the sample to not be compiled"
-   end
-
-+  @tag :skip
-   test "fails on missing write access to .beam file", context do
-     compilation_args = '#{context[:fixture]} -o #{context[:tmp_dir_path]}'
-
-diff --git a/lib/elixir/test/elixir/kernel/dialyzer_test.exs b/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-index 801d852..40fc5bc 100644
---- a/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-+++ b/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-@@ -60,16 +60,19 @@ defmodule Kernel.DialyzerTest do
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on rewrites", context do
-     copy_beam! context, Dialyzer.Rewrite
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on raise", context do
-     copy_beam! context, Dialyzer.Raise
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on macrocallback", context do
-     copy_beam! context, Dialyzer.Macrocallback
-     copy_beam! context, Dialyzer.Macrocallback.Impl
-diff --git a/lib/elixir/test/elixir/system_test.exs b/lib/elixir/test/elixir/system_test.exs
-index aafa559..0f9c178 100644
---- a/lib/elixir/test/elixir/system_test.exs
-+++ b/lib/elixir/test/elixir/system_test.exs
-@@ -53,7 +53,8 @@ defmodule SystemTest do
-     assert System.endianness in [:little, :big]
-     assert System.endianness == System.compiled_endianness
-   end
--
-+
-+  @tag :skip
-   test "argv/0" do
-     list = elixir('-e "IO.inspect System.argv" -- -o opt arg1 arg2 --long-opt 10')
-     {args, _} = Code.eval_string list, []
-diff --git a/lib/mix/test/mix/dep_test.exs b/lib/mix/test/mix/dep_test.exs
-index fff3351..d6ed1b3 100644
---- a/lib/mix/test/mix/dep_test.exs
-+++ b/lib/mix/test/mix/dep_test.exs
-@@ -244,6 +244,7 @@ defmodule Mix.DepTest do
-     end
-   end
-
-+  @tag :skip
-   test "remote converger" do
-     deps = [{:deps_repo, "0.1.0", path: "custom/deps_repo"},
-             {:git_repo, "0.2.0", git: MixTest.Case.fixture_path("git_repo")}]
-@@ -301,6 +302,7 @@ defmodule Mix.DepTest do
-     end
-   end
-
-+  @tag :skip
-   test "remote converger is not invoked if deps diverge" do
-     deps = [{:deps_repo, "0.1.0", path: "custom/deps_repo"},
-             {:git_repo, "0.2.0", git: MixTest.Case.fixture_path("git_repo"), only: :test}]
-
-diff --git a/lib/mix/test/mix/shell/io_test.exs b/lib/mix/test/mix/shell/io_test.exs
-index 9bfb6b4..d982ef3 100644
---- a/lib/mix/test/mix/shell/io_test.exs
-+++ b/lib/mix/test/mix/shell/io_test.exs
-@@ -29,6 +29,7 @@ defmodule Mix.Shell.IOTest do
-     assert capture_io("", fn -> refute yes?("Ok?") end)
-   end
-
-+  @tag :skip
-   test "runs a given command" do
-     assert capture_io("", fn -> assert cmd("echo hello") == 0 end) == "hello\n"
-
-diff --git a/lib/mix/test/mix/shell/quiet_test.exs b/lib/mix/test/mix/shell/quiet_test.exs
-index 626429b..99fab35 100644
---- a/lib/mix/test/mix/shell/quiet_test.exs
-+++ b/lib/mix/test/mix/shell/quiet_test.exs
-@@ -29,6 +29,7 @@ defmodule Mix.Shell.QuietTest do
-     assert capture_io("", fn -> refute yes?("Ok?") end)
-   end
-
-+  @tag :skip
-   test "runs a given command" do
-     assert capture_io("", fn -> assert cmd("echo hello") == 0 end) == ""
-
-diff --git a/lib/mix/test/mix/tasks/cmd_test.exs b/lib/mix/test/mix/tasks/cmd_test.exs
-index db4bf06..4d441f7 100644
---- a/lib/mix/test/mix/tasks/cmd_test.exs
-+++ b/lib/mix/test/mix/tasks/cmd_test.exs
-@@ -3,6 +3,7 @@ Code.require_file "../../test_helper.exs", __DIR__
- defmodule Mix.Tasks.CmdTest do
-   use MixTest.Case
-
-+  @tag :skip
-   test "runs the command for each app" do
-     in_fixture "umbrella_dep/deps/umbrella", fn ->
-       Mix.Project.in_project(:umbrella, ".", fn _ ->
-diff --git a/lib/mix/test/mix/tasks/deps.tree_test.exs b/lib/mix/test/mix/tasks/deps.tree_test.exs
-index 4f09ff3..c371997 100644
---- a/lib/mix/test/mix/tasks/deps.tree_test.exs
-+++ b/lib/mix/test/mix/tasks/deps.tree_test.exs
-@@ -29,6 +29,7 @@ defmodule Mix.Tasks.Deps.TreeTest do
-     end
-   end
-
-+  @tag :skip
-   test "shows the dependency tree", context do
-     Mix.Project.push ConvergedDepsApp
-
-@@ -109,6 +110,7 @@ defmodule Mix.Tasks.Deps.TreeTest do
-     end
-   end
-
-+  @tag :skip
-   test "shows the dependency tree in DOT graph format", context do
-     Mix.Project.push ConvergedDepsApp
-
-diff --git a/lib/mix/test/mix/tasks/deps_test.exs b/lib/mix/test/mix/tasks/deps_test.exs
-index b061777..cc45cf8 100644
---- a/lib/mix/test/mix/tasks/deps_test.exs
-+++ b/lib/mix/test/mix/tasks/deps_test.exs
-@@ -96,6 +96,7 @@
-     end
-   end
-
-+  @tag :skip
-   test "prints list of dependencies and their lock status" do
-     Mix.Project.push DepsApp
-
-@@ -409,6 +409,7 @@ defmodule Mix.Tasks.DepsTest do
-     end
-   end
-
-+  @tag :skip
-   test "fails on diverged dependencies by requirement" do
-     Mix.Project.push ConvergedDepsApp
-
-@@ -440,6 +441,7 @@ defmodule Mix.Tasks.DepsTest do
-     end
-   end
-
-+  @tag :skip
-   test "fails on diverged dependencies even when optional" do
-     Mix.Project.push ConvergedDepsApp
-
-@@ -469,6 +471,7 @@ defmodule Mix.Tasks.DepsTest do
-     end
-   end
-
-+  @tag :skip
-   test "works with converged dependencies" do
-     Mix.Project.push ConvergedDepsApp
-
-@@ -491,6 +494,7 @@ defmodule Mix.Tasks.DepsTest do
-     purge [GitRepo, GitRepo.Mixfile]
-   end
-
-+  @tag :skip
-   test "works with overridden dependencies" do
-     Mix.Project.push OverriddenDepsApp
-
-diff --git a/lib/mix/test/mix/umbrella_test.exs b/lib/mix/test/mix/umbrella_test.exs
-index 69f9428..406668a 100644
---- a/lib/mix/test/mix/umbrella_test.exs
-+++ b/lib/mix/test/mix/umbrella_test.exs
-@@ -98,6 +98,7 @@ defmodule Mix.UmbrellaTest do
-     end
-   end
-
-+  @tag :skip
-   test "loads umbrella child dependencies in all environments" do
-     in_fixture "umbrella_dep/deps/umbrella", fn ->
-       Mix.Project.in_project :umbrella, ".", fn _ ->
-
-diff --git a/lib/elixir/test/elixir/kernel/dialyzer_test.exs b/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-index 792222c..e90beb9 100644
---- a/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-+++ b/lib/elixir/test/elixir/kernel/dialyzer_test.exs
-@@ -54,6 +54,7 @@ defmodule Kernel.DialyzerTest do
-     {:ok, [outdir: dir, dialyzer: dialyzer]}
-   end
-
-+  @tag :skip
-   test "no warnings on valid remote calls", context do
-     copy_beam! context, Dialyzer.RemoteCall
-     assert_dialyze_no_warnings! context
-@@ -78,11 +79,13 @@ defmodule Kernel.DialyzerTest do
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on struct update", context do
-     copy_beam! context, Dialyzer.StructUpdate
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on protocol calls with opaque types", context do
-     copy_beam! context, Dialyzer.ProtocolOpaque
-     copy_beam! context, Dialyzer.ProtocolOpaque.Entity
-@@ -90,6 +93,7 @@ defmodule Kernel.DialyzerTest do
-     assert_dialyze_no_warnings! context
-   end
-
-+  @tag :skip
-   test "no warnings on and/2 and or/2", context do
-     copy_beam! context, Dialyzer.BooleanCheck
-     assert_dialyze_no_warnings! context
-
-diff --git a/Makefile b/Makefile
-index 2fc4f9a..aef8366 100644
---- a/Makefile
-+++ b/Makefile
-@@ -201,7 +201,7 @@ $(TEST_EBIN)/%.beam: $(TEST_ERL)/%.erl
-        $(Q) mkdir -p $(TEST_EBIN)
-        $(Q) $(ERLC) -o $(TEST_EBIN) $<
-
--test_elixir: test_stdlib test_ex_unit test_logger test_mix test_eex test_iex
-+test_elixir: test_stdlib test_ex_unit test_logger test_eex test_iex
-
- test_stdlib: compile
-        @ echo "==> elixir (exunit)"
-