diff --git a/tests/fuzz/fuzz_data_producer.h b/tests/fuzz/fuzz_data_producer.h
index 4a12e130..4fcf6fd4 100644
--- a/tests/fuzz/fuzz_data_producer.h
+++ b/tests/fuzz/fuzz_data_producer.h
@@ -9,6 +9,10 @@
 
 /**
  * Helper APIs for generating random data from input data stream.
+ The producer reads bytes from the end of the input and appends them together
+ to generate  a random number in the requested range. If it runs out of input
+ data, it will keep returning the same value (min) over and over again.
+
  */
 
 #ifndef FUZZ_DATA_PRODUCER_H
diff --git a/tests/fuzz/simple_decompress.c b/tests/fuzz/simple_decompress.c
index 803f7f86..a68813ee 100644
--- a/tests/fuzz/simple_decompress.c
+++ b/tests/fuzz/simple_decompress.c
@@ -31,8 +31,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
       FUZZ_ASSERT(dctx);
   }
 
-  size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 2 * size);
-  void* rBuf = malloc(bufSize);
+  size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size);
+  void *rBuf = malloc(bufSize);
   FUZZ_ASSERT(rBuf);
 
   /* Restrict to remaining data. If we run out of data while generating params,