Fix af26eafd.

.travis.yml

@@ -38,7 +38,7 @@ matrix:
     - rust: nightly
       env: MODE='fuzz run' ARGS='packet_parser -- -max_len=1536 -max_total_time=30'
 before_script:
-  - if [ $MODE == "fuzz" ]; then cargo install cargo-fuzz; fi
+  - if [ "$MODE" == "fuzz run" ]; then cargo install cargo-fuzz; fi
 script:
   - cargo $MODE --no-default-features --features "$FEATURES" $ARGS
 notifications: