4 files changed, 9 insertions, 14 deletions
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..8f7e0913 100644
--- a/libtests/dct_compress.cc
+++ b/libtests/dct_compress.cc
@@ -10,21 +10,17 @@
 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() = default;
     ~Callback() override = default;
     void apply(jpeg_compress_struct*) override;
-    bool called;
+    bool called{false};
 };
 
 void
diff --git a/libtests/json_parse.cc b/libtests/json_parse.cc
index 35abb68f..757b698b 100644
--- a/libtests/json_parse.cc
+++ b/libtests/json_parse.cc
@@ -10,7 +10,7 @@ namespace
     class Reactor: public JSON::Reactor
     {
       public:
-        virtual ~Reactor() = default;
+        ~Reactor() override = default;
         void dictionaryStart() override;
         void arrayStart() override;
         void containerEnd(JSON const& value) override;
diff --git a/libtests/random.cc b/libtests/random.cc
index 899c264c..afd2ed6c 100644
--- a/libtests/random.cc
+++ b/libtests/random.cc
@@ -6,10 +6,10 @@
 class BogusRandomDataProvider: public RandomDataProvider
 {
   public:
-    virtual ~BogusRandomDataProvider() = default;
+    ~BogusRandomDataProvider() override = default;
     BogusRandomDataProvider() = default;
-    virtual void
-    provideRandomData(unsigned char* data, size_t len)
+    void
+    provideRandomData(unsigned char* data, size_t len) override
     {
         for (size_t i = 0; i < len; ++i) {
             data[i] = static_cast<unsigned char>(i & 0xff);