diff --git a/fuzz/html.options b/fuzz/html.options
index a32c583e..e5d3bbee 100644
--- a/fuzz/html.options
+++ b/fuzz/html.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 1000000
 timeout = 20
diff --git a/fuzz/regexp.c b/fuzz/regexp.c
index 3b35671b..cfffedd9 100644
--- a/fuzz/regexp.c
+++ b/fuzz/regexp.c
@@ -21,6 +21,9 @@ LLVMFuzzerTestOneInput(const char *data, size_t size) {
     char *str[2] = { NULL, NULL };
     size_t numStrings;
 
+    if (size > 200)
+        return(0);
+
     numStrings = xmlFuzzExtractStrings(data, size, str, 2);
 
     /* CUR_SCHAR doesn't handle invalid UTF-8 and may cause infinite loops. */
diff --git a/fuzz/regexp.options b/fuzz/regexp.options
index 09b9e6f0..ea2a7a23 100644
--- a/fuzz/regexp.options
+++ b/fuzz/regexp.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 200
 timeout = 5
diff --git a/fuzz/schema.c b/fuzz/schema.c
index f1ee9380..7b034eca 100644
--- a/fuzz/schema.c
+++ b/fuzz/schema.c
@@ -21,6 +21,9 @@ int
 LLVMFuzzerTestOneInput(const char *data, size_t size) {
     xmlSchemaParserCtxtPtr pctxt;
 
+    if (size > 50000)
+        return(0);
+
     xmlFuzzDataInit(data, size);
     xmlFuzzReadEntities();
 
diff --git a/fuzz/schema.options b/fuzz/schema.options
index 195ec544..e5d3bbee 100644
--- a/fuzz/schema.options
+++ b/fuzz/schema.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 80000
 timeout = 20
diff --git a/fuzz/uri.c b/fuzz/uri.c
index 69d0439f..5e4c099c 100644
--- a/fuzz/uri.c
+++ b/fuzz/uri.c
@@ -13,6 +13,9 @@ LLVMFuzzerTestOneInput(const char *data, size_t size) {
     char *str[2] = { NULL, NULL };
     size_t numStrings;
 
+    if (size > 10000)
+        return(0);
+
     numStrings = xmlFuzzExtractStrings(data, size, str, 2);
 
     uri = xmlParseURI(str[0]);
diff --git a/fuzz/uri.options b/fuzz/uri.options
index 8c45a722..ea2a7a23 100644
--- a/fuzz/uri.options
+++ b/fuzz/uri.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 10000
 timeout = 5
diff --git a/fuzz/xml.c b/fuzz/xml.c
index 09867cf7..97b40b87 100644
--- a/fuzz/xml.c
+++ b/fuzz/xml.c
@@ -29,13 +29,18 @@ LLVMFuzzerTestOneInput(const char *data, size_t size) {
     xmlTextReaderPtr reader;
     xmlChar *out;
     const char *docBuffer, *docUrl;
-    size_t docSize, consumed, chunkSize;
+    size_t maxSize, docSize, consumed, chunkSize;
     int opts, outSize;
 
     xmlFuzzDataInit(data, size);
     opts = xmlFuzzReadInt();
-    /* XML_PARSE_HUGE still causes timeouts. */
-    opts &= ~XML_PARSE_HUGE;
+
+    /* Lower maximum size when processing entities for now. */
+    maxSize = opts & XML_PARSE_NOENT ? 50000 : 500000;
+    if (size > maxSize) {
+        xmlFuzzDataCleanup();
+        return(0);
+    }
 
     xmlFuzzReadEntities();
     docBuffer = xmlFuzzMainEntity(&docSize);
diff --git a/fuzz/xml.options b/fuzz/xml.options
index 195ec544..e5d3bbee 100644
--- a/fuzz/xml.options
+++ b/fuzz/xml.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 80000
 timeout = 20
diff --git a/fuzz/xpath.c b/fuzz/xpath.c
index 767acb98..4cb29f67 100644
--- a/fuzz/xpath.c
+++ b/fuzz/xpath.c
@@ -23,6 +23,9 @@ LLVMFuzzerTestOneInput(const char *data, size_t size) {
     const char *expr, *xml;
     size_t exprSize, xmlSize;
 
+    if (size > 10000)
+        return(0);
+
     xmlFuzzDataInit(data, size);
 
     expr = xmlFuzzReadString(&exprSize);
diff --git a/fuzz/xpath.options b/fuzz/xpath.options
index 02d5e976..e5d3bbee 100644
--- a/fuzz/xpath.options
+++ b/fuzz/xpath.options
@@ -1,3 +1,2 @@
 [libfuzzer]
-max_len = 10000
 timeout = 20