diff --git a/projects/goipp/fuzzer/fuzz_collections.go b/projects/goipp/fuzzer/fuzz_collections.go
new file mode 100644
index 0000000..2530b74
--- /dev/null
+++ b/projects/goipp/fuzzer/fuzz_collections.go
@@ -0,0 +1,32 @@
+/*
+ * Fuzz target for goipp's handling of Collection attributes.
+ */
+
+
+package fuzzer
+
+import (
+	"testing"
+	"github.com/OpenPrinting/goipp"
+)
+
+
+func FuzzCollections(f *testing.F) {  
+    f.Fuzz(func(t *testing.T, data []byte) {  
+        var m goipp.Message  
+        if err := m.DecodeBytes(data); err != nil {  
+            t.Skip()  
+        }  
+          
+        // Test that collections can be accessed without panics  
+        for _, group := range m.AttrGroups() {  
+            for _, attr := range group.Attrs {  
+                for _, val := range attr.Values {  
+                    if collection, ok := val.V.(goipp.Collection); ok {  
+                        _ = collection.String()   
+                    }  
+                }  
+            }  
+        }  
+    })  
+} 
\ No newline at end of file
diff --git a/projects/goipp/oss_fuzz_build.sh b/projects/goipp/oss_fuzz_build.sh
index 694309a..7e066e8 100644
--- a/projects/goipp/oss_fuzz_build.sh
+++ b/projects/goipp/oss_fuzz_build.sh
@@ -4,23 +4,21 @@ mkdir -p $SRC/goipp/fuzzer
 cp $SRC/fuzzing/projects/goipp/fuzzer/fuzz_decode_bytes.go $SRC/goipp/fuzzer/
 cp $SRC/fuzzing/projects/goipp/fuzzer/fuzz_decode_bytes_ex.go $SRC/goipp/fuzzer/
 cp $SRC/fuzzing/projects/goipp/fuzzer/fuzz_round_trip.go $SRC/goipp/fuzzer/
+cp $SRC/fuzzing/projects/goipp/fuzzer/fuzz_collections.go $SRC/goipp/fuzzer/
 
-# seed corpus for FuzzDecodeBytes
-mkdir -p $WORK/fuzz_decode_bytes_corpus
-cp $SRC/fuzzing/projects/goipp/seeds/fuzz_decode_bytes_seed_corpus/* $WORK/fuzz_decode_bytes_corpus/
+# Corpus for fuzzers that accept good AND bad messages
+mkdir -p $WORK/good_and_bad_ipp_messages_seed_corpus
+cp $SRC/fuzzing/projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/* $WORK/good_and_bad_ipp_messages_seed_corpus/
 cd $WORK
-zip -r $OUT/fuzz_decode_bytes_seed_corpus.zip fuzz_decode_bytes_corpus/
+zip -r $OUT/fuzz_decode_bytes_seed_corpus.zip good_and_bad_ipp_messages_seed_corpus/
+zip -r $OUT/fuzz_decode_bytes_ex_seed_corpus.zip good_and_bad_ipp_messages_seed_corpus/
+zip -r $OUT/fuzz_collections_seed_corpus.zip good_and_bad_ipp_messages_seed_corpus/
 
-# seed corpus for FuzzDecodeBytesEx
-mkdir -p $WORK/fuzz_decode_bytes_ex_corpus
-cp $SRC/fuzzing/projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/* $WORK/fuzz_decode_bytes_ex_corpus/
-zip -r $OUT/fuzz_decode_bytes_ex_seed_corpus.zip fuzz_decode_bytes_ex_corpus/
-
-# seed corpus for FuzzRoundTrip
-mkdir -p $WORK/fuzz_round_trip_corpus
-cp $SRC/fuzzing/projects/goipp/seeds/fuzz_round_trip_seed_corpus/* $WORK/fuzz_round_trip_corpus/
-zip -r $OUT/fuzz_round_trip_seed_corpus.zip fuzz_round_trip_corpus/
 
+# Corpus for fuzzers that expect only valid (good) IPP messages
+mkdir -p $WORK/good_ipp_messages_seed_corpus
+cp $SRC/fuzzing/projects/goipp/seeds/good_ipp_messages_seed_corpus/* $WORK/good_ipp_messages_seed_corpus/
+zip -r $OUT/fuzz_round_trip_seed_corpus.zip good_ipp_messages_seed_corpus/
 
 # build dependencies and fiuzzers
 cd $SRC/goipp
@@ -30,4 +28,5 @@ go get github.com/AdamKorcz/go-118-fuzz-build/testing
 
 compile_native_go_fuzzer github.com/OpenPrinting/goipp/fuzzer FuzzDecodeBytes fuzz_decode_bytes
 compile_native_go_fuzzer github.com/OpenPrinting/goipp/fuzzer FuzzDecodeBytesEx fuzz_decode_bytes_ex
-compile_native_go_fuzzer github.com/OpenPrinting/goipp/fuzzer FuzzRoundTrip fuzz_round_trip
\ No newline at end of file
+compile_native_go_fuzzer github.com/OpenPrinting/goipp/fuzzer FuzzRoundTrip fuzz_round_trip
+compile_native_go_fuzzer github.com/OpenPrinting/goipp/fuzzer FuzzCollections fuzz_collections
diff --git a/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage1.ipp b/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage1.ipp
deleted file mode 100644
index adbff08..0000000
Binary files a/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage1.ipp and /dev/null differ
diff --git a/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage2.ipp b/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage2.ipp
deleted file mode 100644
index f07cc15..0000000
Binary files a/projects/goipp/seeds/fuzz_round_trip_seed_corpus/goodMessage2.ipp and /dev/null differ
diff --git a/projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/badmessage1.ipp b/projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/badmessage1.ipp
similarity index 100%
rename from projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/badmessage1.ipp
rename to projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/badmessage1.ipp
diff --git a/projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/goodMessage1.ipp b/projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/goodMessage1.ipp
similarity index 100%
rename from projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/goodMessage1.ipp
rename to projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/goodMessage1.ipp
diff --git a/projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/goodMessage2.ipp b/projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/goodMessage2.ipp
similarity index 100%
rename from projects/goipp/seeds/fuzz_decode_bytes_ex_seed_corpus/goodMessage2.ipp
rename to projects/goipp/seeds/good_and_bad_ipp_messages_seed_corpus/goodMessage2.ipp
diff --git a/projects/goipp/seeds/fuzz_decode_bytes_seed_corpus/goodMessage1.ipp b/projects/goipp/seeds/good_ipp_messages_seed_corpus/goodMessage1.ipp
similarity index 100%
rename from projects/goipp/seeds/fuzz_decode_bytes_seed_corpus/goodMessage1.ipp
rename to projects/goipp/seeds/good_ipp_messages_seed_corpus/goodMessage1.ipp
diff --git a/projects/goipp/seeds/fuzz_decode_bytes_seed_corpus/goodMessage2.ipp b/projects/goipp/seeds/good_ipp_messages_seed_corpus/goodMessage2.ipp
similarity index 100%
rename from projects/goipp/seeds/fuzz_decode_bytes_seed_corpus/goodMessage2.ipp
rename to projects/goipp/seeds/good_ipp_messages_seed_corpus/goodMessage2.ipp