diff --git a/README.md b/README.md
index bbf4d47..1992099 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@
 $ make -j6
 ```
 
-To run tests, type:
+To run tests (Git only, these are not included in the release tarball), type:
 
 ```
 $ make test
diff --git a/make-release-tarball.sh b/make-release-tarball.sh
index 6d6675c..45873be 100755
--- a/make-release-tarball.sh
+++ b/make-release-tarball.sh
@@ -19,6 +19,7 @@
           grep -v ^tests |
           grep -v third_party/protobuf |
           grep -v 'third_party/capstone/\(suite\|bindings\|xcode\|msvc\|contrib\)' |
+          grep -v third_party/abseil-cpp/absl/time/internal/cctz/testdata |
           grep -v ^.git)
 FILES="$FILES $(git ls-files --exclude-standard --recurse-submodules |
           grep 'third_party/protobuf/\(src\|cmake\|configure.ac\)')"