Update .kokoro
diff --git a/.kokoro b/.kokoro
index 19799ce..88e4018 100755
--- a/.kokoro
+++ b/.kokoro
@@ -51,9 +51,11 @@
 
 fix_bazel_imports
 
-bazel version
-use_bazel.sh 0.11.0
-bazel version
+if [ -n "$KOKORO_BUILD_NUMBER" ]; then
+  bazel version
+  use_bazel.sh 0.11.0
+  bazel version
+fi
 
 ./.kokoro-ios-runner/bazel.sh test //:UnitTests --min-xcode-version 8.3.0