diff --git a/libqpdf/QPDF_encryption.cc b/libqpdf/QPDF_encryption.cc
index 935c0a1..e5dca43 100644
--- a/libqpdf/QPDF_encryption.cc
+++ b/libqpdf/QPDF_encryption.cc
@@ -664,7 +664,7 @@ QPDF::EncryptionParameters::initialize(QPDF& qpdf)
 
     std::string id1;
     auto id_obj = trailer.getKey("/ID");
-    if (!id_obj.isArray() || id_obj.getArrayNItems() != 2 || !id_obj.getArrayItem(0).isString()) {
+    if (id_obj.size() != 2 || !id_obj.getArrayItem(0).isString()) {
         // Treating a missing ID as the empty string enables qpdf to decrypt some invalid encrypted
         // files with no /ID that poppler can read but Adobe Reader can't.
         qpdf.warn(qpdf.damagedPDF("trailer", "invalid /ID in trailer dictionary"));
@@ -961,19 +961,21 @@ QPDF::decryptStream(
             } else if (
                 stream_dict.getKey("/DecodeParms").isArray() &&
                 stream_dict.getKey("/Filter").isArray()) {
-                QPDFObjectHandle filter = stream_dict.getKey("/Filter");
-                QPDFObjectHandle decode = stream_dict.getKey("/DecodeParms");
-                if (filter.getArrayNItems() == decode.getArrayNItems()) {
-                    for (int i = 0; i < filter.getArrayNItems(); ++i) {
-                        if (filter.getArrayItem(i).isNameAndEquals("/Crypt")) {
-                            QPDFObjectHandle crypt_params = decode.getArrayItem(i);
+                auto filter = stream_dict.getKey("/Filter");
+                auto decode = stream_dict.getKey("/DecodeParms");
+                if (filter.size() == decode.size()) {
+                    int i = 0;
+                    for (auto const& item: filter.as_array()) {
+                        if (item.isNameAndEquals("/Crypt")) {
+                            auto crypt_params = decode.getArrayItem(i);
                             if (crypt_params.isDictionary() &&
                                 crypt_params.getKey("/Name").isName()) {
-                                QTC::TC("qpdf", "QPDF_encrypt crypt array");
                                 method = encp->interpretCF(crypt_params.getKey("/Name"));
                                 method_source = "stream's Crypt decode parameters (array)";
                             }
+                            break;
                         }
+                        ++i;
                     }
                 }
             }
diff --git a/libqpdf/QPDF_linearization.cc b/libqpdf/QPDF_linearization.cc
index 2dc21fc..c0f5585 100644
--- a/libqpdf/QPDF_linearization.cc
+++ b/libqpdf/QPDF_linearization.cc
@@ -174,14 +174,13 @@ QPDF::readLinearizationData()
     }
 
     // Hint table array: offset length [ offset length ]
-    size_t n_H_items = toS(H.getArrayNItems());
-    if (!((n_H_items == 2) || (n_H_items == 4))) {
+    size_t n_H_items = H.size();
+    if (!(n_H_items == 2 || n_H_items == 4)) {
         throw damagedPDF("linearization dictionary", "H has the wrong number of items");
     }
 
     std::vector<int> H_items;
-    for (size_t i = 0; i < n_H_items; ++i) {
-        QPDFObjectHandle oh(H.getArrayItem(toI(i)));
+    for (auto const& oh: H.as_array()) {
         if (oh.isInteger()) {
             H_items.push_back(oh.getIntValueAsInt());
         } else {
diff --git a/libqpdf/QPDF_objects.cc b/libqpdf/QPDF_objects.cc
index ecae23d..168c1c8 100644
--- a/libqpdf/QPDF_objects.cc
+++ b/libqpdf/QPDF_objects.cc
@@ -782,7 +782,7 @@ std::pair<int, std::array<int, 3>>
 QPDF::processXRefW(QPDFObjectHandle& dict, std::function<QPDFExc(std::string_view)> damaged)
 {
     auto W_obj = dict.getKey("/W");
-    if (!(W_obj.isArray() && (W_obj.getArrayNItems() >= 3) && W_obj.getArrayItem(0).isInteger() &&
+    if (!(W_obj.size() >= 3 && W_obj.getArrayItem(0).isInteger() &&
           W_obj.getArrayItem(1).isInteger() && W_obj.getArrayItem(2).isInteger())) {
         throw damaged("Cross-reference stream does not have a proper /W key");
     }
diff --git a/libqpdf/QPDF_pages.cc b/libqpdf/QPDF_pages.cc
index 757a013..b3564ef 100644
--- a/libqpdf/QPDF_pages.cc
+++ b/libqpdf/QPDF_pages.cc
@@ -313,7 +313,7 @@ QPDF::insertPage(QPDFObjectHandle newpage, int pos)
 
     newpage.replaceKey("/Parent", pages);
     kids.insertItem(pos, newpage);
-    int npages = kids.getArrayNItems();
+    int npages = static_cast<int>(kids.size());
     pages.replaceKey("/Count", QPDFObjectHandle::newInteger(npages));
     m->all_pages.insert(m->all_pages.begin() + pos, newpage);
     for (int i = pos + 1; i < npages; ++i) {
@@ -337,7 +337,7 @@ QPDF::removePage(QPDFObjectHandle page)
     QPDFObjectHandle kids = pages.getKey("/Kids");
 
     kids.eraseItem(pos);
-    int npages = kids.getArrayNItems();
+    int npages = static_cast<int>(kids.size());
     pages.replaceKey("/Count", QPDFObjectHandle::newInteger(npages));
     m->all_pages.erase(m->all_pages.begin() + pos);
     m->pageobj_to_pages_pos.erase(page.getObjGen());
diff --git a/qpdf/qpdf.testcov b/qpdf/qpdf.testcov
index 754eaff..e39e04f 100644
--- a/qpdf/qpdf.testcov
+++ b/qpdf/qpdf.testcov
@@ -237,7 +237,6 @@ QPDFWriter remove ADBE 0
 QPDFWriter remove existing Extensions 0
 QPDFWriter preserve ADBE 0
 QPDF_encryption skip 0x28 0
-QPDF_encrypt crypt array 0
 QPDF_encryption CFM AESV3 0
 qpdf-c called qpdf_get_pdf_extension_level 0
 qpdf-c called qpdf_set_r5_encryption_parameters 0