attempt local tagging e2e test to get it working on CI

.bazelci/presubmit.yml

diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index b1857e1..599ddde 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -4,22 +4,16 @@
     build_targets:
     - "..."
     test_targets:
-    - "--"
     - "..."
-    # This test is currently failing on ubuntu on CI (but 
-    # passes when manually run on ubuntu.
-    # TODO(cparsons): Fix and enable.
-    - "-//tests:unittest_e2e_test"
+    test_flags:
+    - "--test_env=PATH"
   ubuntu1604:
     build_targets:
     - "..."
     test_targets:
-    - "--"
     - "..."
-    # This test is currently failing on ubuntu on CI (but 
-    # passes when manually run on ubuntu.
-    # TODO(cparsons): Fix and enable.
-    - "-//tests:unittest_e2e_test"
+    test_flags:
+    - "--test_env=PATH"
   macos:
     build_targets:
     - "..."

tests/BUILD

diff --git a/tests/BUILD b/tests/BUILD
index 30bebcb..576d798 100644
--- a/tests/BUILD
+++ b/tests/BUILD
@@ -40,8 +40,8 @@
 
 bzl_library(
     name = "unittest_tests",
-    srcs = [ "unittest_tests.bzl" ],
-    deps = [ "//lib:unittest" ],
+    srcs = ["unittest_tests.bzl"],
+    deps = ["//lib:unittest"],
 )
 
 sh_test(
@@ -53,4 +53,5 @@
         "//toolchains/unittest:test_deps",
         "@bazel_tools//tools/bash/runfiles",
     ],
+    tags = ["local"],
 )