diff --git a/test/runtimes/BUILD b/test/runtimes/BUILD
index ee65cc17d..1f9a6dd40 100644
--- a/test/runtimes/BUILD
+++ b/test/runtimes/BUILD
@@ -46,4 +46,5 @@ bzl_library(
     name = "defs_bzl",
     srcs = ["defs.bzl"],
     visibility = ["//visibility:private"],
+    deps = ["//tools:defs_bzl"],
 )
diff --git a/test/runtimes/defs.bzl b/test/runtimes/defs.bzl
index 68143474a..e60f763d0 100644
--- a/test/runtimes/defs.bzl
+++ b/test/runtimes/defs.bzl
@@ -1,6 +1,6 @@
 """Defines a rule for runtime test targets."""
 
-load("//tools:defs.bzl", "go_test")
+load("//tools:defs.bzl", "go_test", "local_test_tags")
 
 def _runtime_test_impl(ctx):
     # Construct arguments.
@@ -80,8 +80,7 @@ def runtime_test(name, **kwargs):
         tags = [
             "no-sandbox",
             "manual",
-            "notap",
-        ],
+        ] + local_test_tags,
         **kwargs
     )
 
diff --git a/tools/bazeldefs/tags.bzl b/tools/bazeldefs/tags.bzl
index 80dfc6f2c..f2257c784 100644
--- a/tools/bazeldefs/tags.bzl
+++ b/tools/bazeldefs/tags.bzl
@@ -59,3 +59,6 @@ generic = [
 # combinations, but not so much that it will cause issues. We can probably add
 # quite a few more variants before this becomes a genuine problem.
 go_suffixes = explode(explode(archs, oses), generic)
+
+# Tags for tests that are run locally.
+local_test_tags = ["notap"]
diff --git a/tools/defs.bzl b/tools/defs.bzl
index 10971c9a7..56fc9fc64 100644
--- a/tools/defs.bzl
+++ b/tools/defs.bzl
@@ -10,7 +10,7 @@ load("//tools/bazeldefs:defs.bzl", _BuildSettingInfo = "BuildSettingInfo", _bool
 load("//tools/bazeldefs:go.bzl", _gazelle = "gazelle", _go_binary = "go_binary", _go_grpc_and_proto_libraries = "go_grpc_and_proto_libraries", _go_library = "go_library", _go_path = "go_path", _go_proto_library = "go_proto_library", _go_test = "go_test", _gotsan_flag_values = "gotsan_flag_values", _gotsan_values = "gotsan_values", _select_goarch = "select_goarch", _select_goos = "select_goos")
 load("//tools/bazeldefs:pkg.bzl", _pkg_deb = "pkg_deb", _pkg_tar = "pkg_tar")
 load("//tools/bazeldefs:platforms.bzl", _default_platform = "default_platform", _platform_capabilities = "platform_capabilities", _platforms = "platforms", _save_restore_platforms = "save_restore_platforms")
-load("//tools/bazeldefs:tags.bzl", "go_suffixes")
+load("//tools/bazeldefs:tags.bzl", _go_suffixes = "go_suffixes", _local_test_tags = "local_test_tags")
 load("//tools/go_marshal:defs.bzl", "go_marshal", "marshal_deps", "marshal_test_deps")
 load("//tools/go_stateify:defs.bzl", "go_stateify")
 load("//tools/nogo:defs.bzl", "nogo_test")
@@ -64,6 +64,9 @@ platforms = _platforms
 platform_capabilities = _platform_capabilities
 save_restore_platforms = _save_restore_platforms
 
+# Tags.
+local_test_tags = _local_test_tags
+
 def go_binary(name, nogo = True, pure = False, static = False, x_defs = None, **kwargs):
     """Wraps the standard go_binary.
 
@@ -121,7 +124,7 @@ def calculate_sets(srcs):
         if not file.endswith(".go"):
             continue
         target = ""
-        for suffix in go_suffixes:
+        for suffix in _go_suffixes:
             if file.endswith(suffix + ".go"):
                 target = suffix
         if not target in result: