diff --git a/examples/pdf-count-strings.cc b/examples/pdf-count-strings.cc
index 2061a499..2e2ef8bf 100644
--- a/examples/pdf-count-strings.cc
+++ b/examples/pdf-count-strings.cc
@@ -26,8 +26,7 @@ usage()
 class StringCounter: public QPDFObjectHandle::TokenFilter
 {
   public:
-    StringCounter() :
-        count(0)
+    StringCounter()
     {
     }
     ~StringCounter() override = default;
@@ -36,7 +35,7 @@ class StringCounter: public QPDFObjectHandle::TokenFilter
     int getCount() const;
 
   private:
-    int count;
+    int count{0};
 };
 
 void
diff --git a/examples/pdf-create.cc b/examples/pdf-create.cc
index 7b44fb7f..136643d1 100644
--- a/examples/pdf-create.cc
+++ b/examples/pdf-create.cc
@@ -31,22 +31,18 @@ class ImageProvider: public QPDFObjectHandle::StreamDataProvider
     size_t getHeight() const;
 
   private:
-    size_t width;
-    size_t stripe_height;
+    size_t width{400};
+    size_t stripe_height{80};
     std::string color_space;
     std::string filter;
-    size_t n_stripes;
+    size_t n_stripes{6};
     std::vector<std::string> stripes;
-    J_COLOR_SPACE j_color_space;
+    J_COLOR_SPACE j_color_space{JCS_UNKNOWN};
 };
 
 ImageProvider::ImageProvider(std::string const& color_space, std::string const& filter) :
-    width(400),
-    stripe_height(80),
     color_space(color_space),
-    filter(filter),
-    n_stripes(6),
-    j_color_space(JCS_UNKNOWN)
+    filter(filter)
 {
     if (color_space == "/DeviceCMYK") {
         j_color_space = JCS_CMYK;
diff --git a/include/qpdf/InputSource.hh b/include/qpdf/InputSource.hh
index 2bc57c57..c1785a25 100644
--- a/include/qpdf/InputSource.hh
+++ b/include/qpdf/InputSource.hh
@@ -33,8 +33,7 @@ class QPDF_DLL_CLASS InputSource
 {
   public:
     QPDF_DLL
-    InputSource() :
-        last_offset(0)
+    InputSource()
     {
     }
     QPDF_DLL
@@ -86,7 +85,7 @@ class QPDF_DLL_CLASS InputSource
     inline void loadBuffer();
 
   protected:
-    qpdf_offset_t last_offset;
+    qpdf_offset_t last_offset{0};
 
   private:
     class QPDF_DLL_PRIVATE Members
diff --git a/include/qpdf/QPDF.hh b/include/qpdf/QPDF.hh
index 152421ad..d5266066 100644
--- a/include/qpdf/QPDF.hh
+++ b/include/qpdf/QPDF.hh
@@ -1150,58 +1150,40 @@ class QPDF
     // PDF 1.4: Table F.4
     struct HPageOffsetEntry
     {
-        HPageOffsetEntry() :
-            delta_nobjects(0),
-            delta_page_length(0),
-            nshared_objects(0),
-            delta_content_offset(0),
-            delta_content_length(0)
+        HPageOffsetEntry()
         {
         }
 
-        int delta_nobjects;              // 1
-        qpdf_offset_t delta_page_length; // 2
-        int nshared_objects;             // 3
+        int delta_nobjects{0};              // 1
+        qpdf_offset_t delta_page_length{0}; // 2
         // vectors' sizes = nshared_objects
-        std::vector<int> shared_identifiers; // 4
-        std::vector<int> shared_numerators;  // 5
-        qpdf_offset_t delta_content_offset;  // 6
-        qpdf_offset_t delta_content_length;  // 7
+        int nshared_objects{0};                // 3
+        std::vector<int> shared_identifiers;   // 4
+        std::vector<int> shared_numerators;    // 5
+        qpdf_offset_t delta_content_offset{0}; // 6
+        qpdf_offset_t delta_content_length{0}; // 7
     };
 
     // PDF 1.4: Table F.3
     struct HPageOffset
     {
-        HPageOffset() :
-            min_nobjects(0),
-            first_page_offset(0),
-            nbits_delta_nobjects(0),
-            min_page_length(0),
-            nbits_delta_page_length(0),
-            min_content_offset(0),
-            nbits_delta_content_offset(0),
-            min_content_length(0),
-            nbits_delta_content_length(0),
-            nbits_nshared_objects(0),
-            nbits_shared_identifier(0),
-            nbits_shared_numerator(0),
-            shared_denominator(0)
+        HPageOffset()
         {
         }
 
-        int min_nobjects;                // 1
-        qpdf_offset_t first_page_offset; // 2
-        int nbits_delta_nobjects;        // 3
-        int min_page_length;             // 4
-        int nbits_delta_page_length;     // 5
-        int min_content_offset;          // 6
-        int nbits_delta_content_offset;  // 7
-        int min_content_length;          // 8
-        int nbits_delta_content_length;  // 9
-        int nbits_nshared_objects;       // 10
-        int nbits_shared_identifier;     // 11
-        int nbits_shared_numerator;      // 12
-        int shared_denominator;          // 13
+        int min_nobjects{0};                // 1
+        qpdf_offset_t first_page_offset{0}; // 2
+        int nbits_delta_nobjects{0};        // 3
+        int min_page_length{0};             // 4
+        int nbits_delta_page_length{0};     // 5
+        int min_content_offset{0};          // 6
+        int nbits_delta_content_offset{0};  // 7
+        int min_content_length{0};          // 8
+        int nbits_delta_content_length{0};  // 9
+        int nbits_nshared_objects{0};       // 10
+        int nbits_shared_identifier{0};     // 11
+        int nbits_shared_numerator{0};      // 12
+        int shared_denominator{0};          // 13
         // vector size is npages
         std::vector<HPageOffsetEntry> entries;
     };
@@ -1209,40 +1191,30 @@ class QPDF
     // PDF 1.4: Table F.6
     struct HSharedObjectEntry
     {
-        HSharedObjectEntry() :
-            delta_group_length(0),
-            signature_present(0),
-            nobjects_minus_one(0)
+        HSharedObjectEntry()
         {
         }
 
         // Item 3 is a 128-bit signature (unsupported by Acrobat)
-        int delta_group_length; // 1
-        int signature_present;  // 2 -- always 0
-        int nobjects_minus_one; // 4 -- always 0
+        int delta_group_length{0}; // 1
+        int signature_present{0};  // 2 -- always 0
+        int nobjects_minus_one{0}; // 4 -- always 0
     };
 
     // PDF 1.4: Table F.5
     struct HSharedObject
     {
-        HSharedObject() :
-            first_shared_obj(0),
-            first_shared_offset(0),
-            nshared_first_page(0),
-            nshared_total(0),
-            nbits_nobjects(0),
-            min_group_length(0),
-            nbits_delta_group_length(0)
+        HSharedObject()
         {
         }
 
-        int first_shared_obj;              // 1
-        qpdf_offset_t first_shared_offset; // 2
-        int nshared_first_page;            // 3
-        int nshared_total;                 // 4
-        int nbits_nobjects;                // 5
-        int min_group_length;              // 6
-        int nbits_delta_group_length;      // 7
+        int first_shared_obj{0};              // 1
+        qpdf_offset_t first_shared_offset{0}; // 2
+        int nshared_first_page{0};            // 3
+        int nshared_total{0};                 // 4
+        int nbits_nobjects{0};                // 5
+        int min_group_length{0};              // 6
+        int nbits_delta_group_length{0};      // 7
         // vector size is nshared_total
         std::vector<HSharedObjectEntry> entries;
     };
@@ -1250,18 +1222,14 @@ class QPDF
     // PDF 1.4: Table F.9
     struct HGeneric
     {
-        HGeneric() :
-            first_object(0),
-            first_object_offset(0),
-            nobjects(0),
-            group_length(0)
+        HGeneric()
         {
         }
 
-        int first_object;                  // 1
-        qpdf_offset_t first_object_offset; // 2
-        int nobjects;                      // 3
-        int group_length;                  // 4
+        int first_object{0};                  // 1
+        qpdf_offset_t first_object_offset{0}; // 2
+        int nobjects{0};                      // 3
+        int group_length{0};                  // 4
     };
 
     // Other linearization data structures
@@ -1269,26 +1237,18 @@ class QPDF
     // Initialized from Linearization Parameter dictionary
     struct LinParameters
     {
-        LinParameters() :
-            file_size(0),
-            first_page_object(0),
-            first_page_end(0),
-            npages(0),
-            xref_zero_offset(0),
-            first_page(0),
-            H_offset(0),
-            H_length(0)
+        LinParameters()
         {
         }
 
-        qpdf_offset_t file_size;        // /L
-        int first_page_object;          // /O
-        qpdf_offset_t first_page_end;   // /E
-        int npages;                     // /N
-        qpdf_offset_t xref_zero_offset; // /T
-        int first_page;                 // /P
-        qpdf_offset_t H_offset;         // offset of primary hint stream
-        qpdf_offset_t H_length;         // length of primary hint stream
+        qpdf_offset_t file_size{0};        // /L
+        int first_page_object{0};          // /O
+        qpdf_offset_t first_page_end{0};   // /E
+        int npages{0};                     // /N
+        qpdf_offset_t xref_zero_offset{0}; // /T
+        int first_page{0};                 // /P
+        qpdf_offset_t H_offset{0};         // offset of primary hint stream
+        qpdf_offset_t H_length{0};         // length of primary hint stream
     };
 
     // Computed hint table value data structures.  These tables contain the computed values on which
@@ -1304,14 +1264,12 @@ class QPDF
 
     struct CHPageOffsetEntry
     {
-        CHPageOffsetEntry() :
-            nobjects(0),
-            nshared_objects(0)
+        CHPageOffsetEntry()
         {
         }
 
-        int nobjects;
-        int nshared_objects;
+        int nobjects{0};
+        int nshared_objects{0};
         // vectors' sizes = nshared_objects
         std::vector<int> shared_identifiers;
     };
@@ -1335,16 +1293,13 @@ class QPDF
     // PDF 1.4: Table F.5
     struct CHSharedObject
     {
-        CHSharedObject() :
-            first_shared_obj(0),
-            nshared_first_page(0),
-            nshared_total(0)
+        CHSharedObject()
         {
         }
 
-        int first_shared_obj;
-        int nshared_first_page;
-        int nshared_total;
+        int first_shared_obj{0};
+        int nshared_first_page{0};
+        int nshared_total{0};
         // vector size is nshared_total
         std::vector<CHSharedObjectEntry> entries;
     };
diff --git a/include/qpdf/QPDFJob.hh b/include/qpdf/QPDFJob.hh
index 37067108..e00ce7d2 100644
--- a/include/qpdf/QPDFJob.hh
+++ b/include/qpdf/QPDFJob.hh
@@ -145,8 +145,7 @@ class QPDFJob
 
     struct AddAttachment
     {
-        AddAttachment() :
-            replace(false)
+        AddAttachment()
         {
         }
 
@@ -157,7 +156,7 @@ class QPDFJob
         std::string moddate;
         std::string mimetype;
         std::string description;
-        bool replace;
+        bool replace{false};
     };
 
     struct PageSpec
diff --git a/include/qpdf/QPDFObjGen.hh b/include/qpdf/QPDFObjGen.hh
index 0f22b481..60c397e4 100644
--- a/include/qpdf/QPDFObjGen.hh
+++ b/include/qpdf/QPDFObjGen.hh
@@ -34,9 +34,7 @@ class QPDFObjGen
   public:
     // ABI: change to default.
     QPDF_DLL
-    QPDFObjGen() :
-        obj(0),
-        gen(0)
+    QPDFObjGen()
     {
     }
     QPDF_DLL
diff --git a/libqpdf/JSON.cc b/libqpdf/JSON.cc
index 9e90f61d..f6401642 100644
--- a/libqpdf/JSON.cc
+++ b/libqpdf/JSON.cc
@@ -588,14 +588,7 @@ namespace
         JSONParser(InputSource& is, JSON::Reactor* reactor) :
             is(is),
             reactor(reactor),
-            lex_state(ls_top),
-            bytes(0),
-            p(buf),
-            u_count(0),
-            offset(0),
-            done(false),
-            parser_state(ps_top),
-            dict_key_offset(0)
+            p(buf)
         {
         }
 
@@ -665,20 +658,20 @@ namespace
 
         InputSource& is;
         JSON::Reactor* reactor;
-        lex_state_e lex_state;
+        lex_state_e lex_state{ls_top};
         char buf[16384];
-        size_t bytes;
+        size_t bytes{0};
         char const* p;
-        qpdf_offset_t u_count;
+        qpdf_offset_t u_count{0};
         unsigned long u_value{0};
-        qpdf_offset_t offset;
-        bool done;
+        qpdf_offset_t offset{0};
+        bool done{false};
         std::string token;
         qpdf_offset_t token_start{0};
-        parser_state_e parser_state;
+        parser_state_e parser_state{ps_top};
         std::vector<StackFrame> stack;
         std::string dict_key;
-        qpdf_offset_t dict_key_offset;
+        qpdf_offset_t dict_key_offset{0};
     };
 } // namespace
 
diff --git a/libqpdf/QPDFAcroFormDocumentHelper.cc b/libqpdf/QPDFAcroFormDocumentHelper.cc
index aefe8d6b..0d336b11 100644
--- a/libqpdf/QPDFAcroFormDocumentHelper.cc
+++ b/libqpdf/QPDFAcroFormDocumentHelper.cc
@@ -473,15 +473,14 @@ namespace
         virtual void handleToken(QPDFTokenizer::Token const&) override;
 
       private:
-        size_t offset;
+        size_t offset{0};
         std::map<std::string, std::map<size_t, std::string>> to_replace;
     };
 } // namespace
 
 ResourceReplacer::ResourceReplacer(
     std::map<std::string, std::map<std::string, std::string>> const& dr_map,
-    std::map<std::string, std::map<std::string, std::set<size_t>>> const& rnames) :
-    offset(0)
+    std::map<std::string, std::map<std::string, std::set<size_t>>> const& rnames)
 {
     // We have:
     // * dr_map[resource_type][key] == new_key
diff --git a/libqpdf/QPDFFormFieldObjectHelper.cc b/libqpdf/QPDFFormFieldObjectHelper.cc
index 67975451..ff21c522 100644
--- a/libqpdf/QPDFFormFieldObjectHelper.cc
+++ b/libqpdf/QPDFFormFieldObjectHelper.cc
@@ -481,8 +481,8 @@ namespace
         std::vector<std::string> opt;
         double tf;
         QPDFObjectHandle::Rectangle bbox;
-        enum { st_top, st_bmc, st_emc, st_end } state;
-        bool replaced;
+        enum { st_top, st_bmc, st_emc, st_end } state{st_top};
+        bool replaced{false};
     };
 } // namespace
 
@@ -496,9 +496,7 @@ ValueSetter::ValueSetter(
     V(V),
     opt(opt),
     tf(tf),
-    bbox(bbox),
-    state(st_top),
-    replaced(false)
+    bbox(bbox)
 {
 }
 
@@ -659,21 +657,17 @@ namespace
         std::string getDA();
 
       private:
-        double tf;
-        int tf_idx;
+        double tf{11.0};
+        int tf_idx{-1};
         std::string font_name;
-        double last_num;
-        int last_num_idx;
+        double last_num{0.0};
+        int last_num_idx{-1};
         std::string last_name;
         std::vector<std::string> DA;
     };
 } // namespace
 
-TfFinder::TfFinder() :
-    tf(11.0),
-    tf_idx(-1),
-    last_num(0.0),
-    last_num_idx(-1)
+TfFinder::TfFinder()
 {
 }
 
diff --git a/libqpdf/QPDFJob_argv.cc b/libqpdf/QPDFJob_argv.cc
index 4a9addbd..aade34cd 100644
--- a/libqpdf/QPDFJob_argv.cc
+++ b/libqpdf/QPDFJob_argv.cc
@@ -40,18 +40,15 @@ namespace
         std::shared_ptr<QPDFJob::UOConfig> c_uo;
         std::shared_ptr<QPDFJob::EncConfig> c_enc;
         std::vector<std::string> accumulated_args;
-        std::shared_ptr<char> pages_password;
-        bool gave_input;
-        bool gave_output;
+        std::shared_ptr<char> pages_password{nullptr};
+        bool gave_input{false};
+        bool gave_output{false};
     };
 } // namespace
 
 ArgParser::ArgParser(QPDFArgParser& ap, std::shared_ptr<QPDFJob::Config> c_main) :
     ap(ap),
-    c_main(c_main),
-    pages_password(nullptr),
-    gave_input(false),
-    gave_output(false)
+    c_main(c_main)
 {
     initOptionTables();
 }
diff --git a/libqpdf/QPDFJob_json.cc b/libqpdf/QPDFJob_json.cc
index 92488df1..95622f36 100644
--- a/libqpdf/QPDFJob_json.cc
+++ b/libqpdf/QPDFJob_json.cc
@@ -59,7 +59,7 @@ namespace
 
         std::list<std::shared_ptr<JSONHandler>> json_handlers;
         bool partial;
-        JSONHandler* jh; // points to last of json_handlers
+        JSONHandler* jh{nullptr}; // points to last of json_handlers
         std::shared_ptr<QPDFJob::Config> c_main;
         std::shared_ptr<QPDFJob::CopyAttConfig> c_copy_att;
         std::shared_ptr<QPDFJob::AttConfig> c_att;
@@ -71,7 +71,6 @@ namespace
 
 Handlers::Handlers(bool partial, std::shared_ptr<QPDFJob::Config> c_main) :
     partial(partial),
-    jh(nullptr),
     c_main(c_main)
 {
     initHandlers();
diff --git a/libqpdf/QPDFLogger.cc b/libqpdf/QPDFLogger.cc
index 76c3c70c..a704ea75 100644
--- a/libqpdf/QPDFLogger.cc
+++ b/libqpdf/QPDFLogger.cc
@@ -12,8 +12,7 @@ namespace
     {
       public:
         Pl_Track(char const* identifier, Pipeline* next) :
-            Pipeline(identifier, next),
-            used(false)
+            Pipeline(identifier, next)
         {
         }
 
@@ -37,7 +36,7 @@ namespace
         }
 
       private:
-        bool used;
+        bool used{false};
     };
 }; // namespace
 
diff --git a/libqpdf/QPDFObjectHandle.cc b/libqpdf/QPDFObjectHandle.cc
index 80e00c88..c63a2e41 100644
--- a/libqpdf/QPDFObjectHandle.cc
+++ b/libqpdf/QPDFObjectHandle.cc
@@ -189,13 +189,12 @@ namespace
         unsigned char getLastChar();
 
       private:
-        unsigned char last_char;
+        unsigned char last_char{0};
     };
 } // namespace
 
 LastChar::LastChar(Pipeline* next) :
-    Pipeline("lastchar", next),
-    last_char(0)
+    Pipeline("lastchar", next)
 {
 }
 
diff --git a/libqpdf/QPDFPageObjectHelper.cc b/libqpdf/QPDFPageObjectHelper.cc
index 44ffd2cf..1bbac2c4 100644
--- a/libqpdf/QPDFPageObjectHelper.cc
+++ b/libqpdf/QPDFPageObjectHelper.cc
@@ -53,19 +53,16 @@ namespace
         QPDFObjectHandle resources;
         std::string dict_str;
         std::string bi_str;
-        int min_suffix;
-        bool any_images;
-        enum { st_top, st_bi } state;
+        int min_suffix{1};
+        bool any_images{false};
+        enum { st_top, st_bi } state{st_top};
     };
 } // namespace
 
 InlineImageTracker::InlineImageTracker(QPDF* qpdf, size_t min_size, QPDFObjectHandle resources) :
     qpdf(qpdf),
     min_size(min_size),
-    resources(resources),
-    min_suffix(1),
-    any_images(false),
-    state(st_top)
+    resources(resources)
 {
 }
 
diff --git a/libqpdf/QUtil.cc b/libqpdf/QUtil.cc
index 09f99529..0fb03579 100644
--- a/libqpdf/QUtil.cc
+++ b/libqpdf/QUtil.cc
@@ -1082,13 +1082,12 @@ namespace
 
       private:
         RandomDataProvider* default_provider;
-        RandomDataProvider* current_provider;
+        RandomDataProvider* current_provider{nullptr};
     };
 } // namespace
 
 RandomDataProviderProvider::RandomDataProviderProvider() :
-    default_provider(CryptoRandomDataProvider::getInstance()),
-    current_provider(nullptr)
+    default_provider(CryptoRandomDataProvider::getInstance())
 {
     this->current_provider = default_provider;
 }
diff --git a/libqpdf/qpdf/QPDFArgParser.hh b/libqpdf/qpdf/QPDFArgParser.hh
index 3b22a805..97fd99c5 100644
--- a/libqpdf/qpdf/QPDFArgParser.hh
+++ b/libqpdf/qpdf/QPDFArgParser.hh
@@ -145,19 +145,15 @@ class QPDFArgParser
   private:
     struct OptionEntry
     {
-        OptionEntry() :
-            parameter_needed(false),
-            bare_arg_handler(nullptr),
-            param_arg_handler(nullptr),
-            invalid_choice_handler(nullptr)
+        OptionEntry()
         {
         }
-        bool parameter_needed;
+        bool parameter_needed{false};
         std::string parameter_name;
         std::set<std::string> choices;
-        bare_arg_handler_t bare_arg_handler;
-        param_arg_handler_t param_arg_handler;
-        param_arg_handler_t invalid_choice_handler;
+        bare_arg_handler_t bare_arg_handler{nullptr};
+        param_arg_handler_t param_arg_handler{nullptr};
+        param_arg_handler_t invalid_choice_handler{nullptr};
     };
     typedef std::map<std::string, OptionEntry> option_table_t;
 
diff --git a/libtests/arg_parser.cc b/libtests/arg_parser.cc
index fde00520..ad9d85e9 100644
--- a/libtests/arg_parser.cc
+++ b/libtests/arg_parser.cc
@@ -28,12 +28,11 @@ class ArgParser
     void output(std::string const&);
 
     QPDFArgParser ap;
-    int quacks;
+    int quacks{0};
 };
 
 ArgParser::ArgParser(int argc, char* argv[]) :
-    ap(QPDFArgParser(argc, argv, "TEST_ARG_PARSER")),
-    quacks(0)
+    ap(QPDFArgParser(argc, argv, "TEST_ARG_PARSER"))
 {
     initOptions();
 }
diff --git a/libtests/dct_compress.cc b/libtests/dct_compress.cc
index 3f7c86a1..ab6e3b53 100644
--- a/libtests/dct_compress.cc
+++ b/libtests/dct_compress.cc
@@ -10,21 +10,19 @@
 static void
 usage()
 {
-    std::cerr << "Usage: dct_compress infile outfile width height"
-              << " {rgb|cmyk|gray}" << std::endl;
+    std::cerr << "Usage: dct_compress infile outfile width height {rgb|cmyk|gray}" << std::endl;
     exit(2);
 }
 
 class Callback: public Pl_DCT::CompressConfig
 {
   public:
-    Callback() :
-        called(false)
+    Callback()
     {
     }
     ~Callback() override = default;
     void apply(jpeg_compress_struct*) override;
-    bool called;
+    bool called{false};
 };
 
 void
diff --git a/qpdf/fix-qdf.cc b/qpdf/fix-qdf.cc
index 60163b4f..5a399b48 100644
--- a/qpdf/fix-qdf.cc
+++ b/qpdf/fix-qdf.cc
@@ -46,42 +46,29 @@ class QdfFixer
         st_before_trailer,
         st_in_trailer,
         st_done,
-    } state;
+    } state{st_top};
 
-    size_t lineno;
-    qpdf_offset_t offset;
-    qpdf_offset_t last_offset;
-    int last_obj;
+    size_t lineno{0};
+    qpdf_offset_t offset{0};
+    qpdf_offset_t last_offset{0};
+    int last_obj{0};
     std::vector<QPDFXRefEntry> xref;
-    qpdf_offset_t stream_start;
-    size_t stream_length;
-    qpdf_offset_t xref_offset;
-    size_t xref_f1_nbytes;
-    size_t xref_f2_nbytes;
-    size_t xref_size;
+    qpdf_offset_t stream_start{0};
+    size_t stream_length{0};
+    qpdf_offset_t xref_offset{0};
+    size_t xref_f1_nbytes{0};
+    size_t xref_f2_nbytes{0};
+    size_t xref_size{0};
     std::vector<std::string_view> ostream;
     std::vector<qpdf_offset_t> ostream_offsets;
     std::vector<std::string_view> ostream_discarded;
-    size_t ostream_idx;
-    int ostream_id;
+    size_t ostream_idx{0};
+    int ostream_id{0};
     std::string ostream_extends;
 };
 
 QdfFixer::QdfFixer(std::string const& filename) :
-    filename(filename),
-    state(st_top),
-    lineno(0),
-    offset(0),
-    last_offset(0),
-    last_obj(0),
-    stream_start(0),
-    stream_length(0),
-    xref_offset(0),
-    xref_f1_nbytes(0),
-    xref_f2_nbytes(0),
-    xref_size(0),
-    ostream_idx(0),
-    ostream_id(0)
+    filename(filename)
 {
 }
 
diff --git a/qpdf/test_driver.cc b/qpdf/test_driver.cc
index 655f480b..0d68dbbd 100644
--- a/qpdf/test_driver.cc
+++ b/qpdf/test_driver.cc
@@ -68,16 +68,15 @@ class Provider: public QPDFObjectHandle::StreamDataProvider
 {
   public:
     Provider(std::shared_ptr<Buffer> b) :
-        b(b),
-        bad_length(false)
+        b(b)
     {
     }
     virtual ~Provider() = default;
     virtual void
     provideStreamData(int objid, int generation, Pipeline* p)
     {
-        // Don't change signature to use QPDFObjGen const& to detect
-        // problems forwarding to legacy implementations.
+        // Don't change signature to use QPDFObjGen const& to detect problems forwarding to legacy
+        // implementations.
         p->write(b->getBuffer(), b->getSize());
         if (this->bad_length) {
             unsigned char ch = ' ';
@@ -93,7 +92,7 @@ class Provider: public QPDFObjectHandle::StreamDataProvider
 
   private:
     std::shared_ptr<Buffer> b;
-    bool bad_length;
+    bool bad_length{false};
 };
 
 class ParserCallbacks: public QPDFObjectHandle::ParserCallbacks
diff --git a/qpdf/test_large_file.cc b/qpdf/test_large_file.cc
index 12a75a84..3c041deb 100644
--- a/qpdf/test_large_file.cc
+++ b/qpdf/test_large_file.cc
@@ -67,15 +67,13 @@ class ImageChecker: public Pipeline
 
   private:
     size_t n;
-    size_t offset;
-    bool okay;
+    size_t offset{0};
+    bool okay{true};
 };
 
 ImageChecker::ImageChecker(size_t n) :
     Pipeline("image checker", nullptr),
-    n(n),
-    offset(0),
-    okay(true)
+    n(n)
 {
 }