diff --git a/test/run_envoy_tests.sh b/test/run_envoy_tests.sh
index 998ec880f81c1..ed9237f7aa59d 100755
--- a/test/run_envoy_tests.sh
+++ b/test/run_envoy_tests.sh
@@ -5,13 +5,7 @@ set -e
 SOURCE_DIR=$1
 BINARY_DIR=$2
 
-# These directories have the Bazel meaning described at
-# https://bazel.build/versions/master/docs/test-encyclopedia.html. In particular, TEST_SRCDIR is
-# where we expect to find the generated outputs of various scripts preparing input data (these are
-# not only the actual source files!).
-: ${TEST_TMPDIR:=/tmp/envoy_test_tmp}
-: ${TEST_SRCDIR:=/tmp/envoy_test_runfiles}
-export TEST_TMPDIR TEST_SRCDIR
+source $SOURCE_DIR/test/setup_test_env.sh
 
 mkdir -p $TEST_TMPDIR
 
diff --git a/test/setup_test_env.sh b/test/setup_test_env.sh
new file mode 100755
index 0000000000000..1fe0ad38e9391
--- /dev/null
+++ b/test/setup_test_env.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# These directories have the Bazel meaning described at
+# https://bazel.build/versions/master/docs/test-encyclopedia.html. In particular, TEST_SRCDIR is
+# where we expect to find the generated outputs of various scripts preparing input data (these are
+# not only the actual source files!).
+: ${TEST_TMPDIR:=/tmp/envoy_test_tmp}
+: ${TEST_SRCDIR:=/tmp/envoy_test_runfiles}
+export TEST_TMPDIR TEST_SRCDIR