diff --git a/part1/run.w_corpus.sh b/part1/run.w_corpus.sh
index 2152aee..8465b59 100755
--- a/part1/run.w_corpus.sh
+++ b/part1/run.w_corpus.sh
@@ -11,4 +11,6 @@ python3 infra/helper.py build_fuzzers --clean libpng
 mkdir -p build/out/corpus
 python3 infra/helper.py run_fuzzer libpng libpng_read_fuzzer --corpus-dir build/out/corpus
 python3 infra/helper.py build_fuzzers --sanitizer coverage libpng
-python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve
+# no-serve: to exit immediately
+# port: in case port 8008 is already allocated, even with no-serve it fails otherwise...
+python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve --port 9531
diff --git a/part1/run.w_o_corpus.sh b/part1/run.w_o_corpus.sh
index 039ce7b..a522b1a 100755
--- a/part1/run.w_o_corpus.sh
+++ b/part1/run.w_o_corpus.sh
@@ -12,4 +12,6 @@ python3 infra/helper.py build_fuzzers --clean libpng
 mkdir -p build/out/corpus
 python3 infra/helper.py run_fuzzer libpng libpng_read_fuzzer --corpus-dir build/out/corpus
 python3 infra/helper.py build_fuzzers --sanitizer coverage libpng
-python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve
+# no-serve: to exit immediately
+# port: in case port 8008 is already allocated, even with no-serve it fails otherwise...
+python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve --port 9531
diff --git a/part3/improve1/run.improve1.sh b/part3/improve1/run.improve1.sh
index 4894048..ad97173 100755
--- a/part3/improve1/run.improve1.sh
+++ b/part3/improve1/run.improve1.sh
@@ -11,4 +11,6 @@ python3 infra/helper.py build_fuzzers --clean libpng
 mkdir -p build/out/corpus
 python3 infra/helper.py run_fuzzer libpng libpng_read_fuzzer --corpus-dir build/out/corpus
 python3 infra/helper.py build_fuzzers --sanitizer coverage libpng
-python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve
+# no-serve: to exit immediately
+# port: in case port 8008 is already allocated, even with no-serve it fails otherwise...
+python3 infra/helper.py coverage libpng --corpus-dir build/out/corpus --fuzz-target libpng_read_fuzzer --no-serve --port 9531