style: clang-tidy: modernize-use-equals-default
diff --git a/tests/test_class.cpp b/tests/test_class.cpp
index 4dd4941..b0e3d3a 100644
--- a/tests/test_class.cpp
+++ b/tests/test_class.cpp
@@ -103,7 +103,7 @@
         BaseClass() = default;
         BaseClass(const BaseClass &) = default;
         BaseClass(BaseClass &&) = default;
-        virtual ~BaseClass() {}
+        virtual ~BaseClass() = default;
     };
     struct DerivedClass1 : BaseClass { };
     struct DerivedClass2 : BaseClass { };
@@ -353,7 +353,7 @@
     // test_reentrant_implicit_conversion_failure
     // #1035: issue with runaway reentrant implicit conversion
     struct BogusImplicitConversion {
-        BogusImplicitConversion(const BogusImplicitConversion &) { }
+        BogusImplicitConversion(const BogusImplicitConversion &) = default;
     };
 
     py::class_<BogusImplicitConversion>(m, "BogusImplicitConversion")
@@ -407,7 +407,7 @@
     py::class_<IsNonFinalFinal>(m, "IsNonFinalFinal", py::is_final());
 
     struct PyPrintDestructor {
-        PyPrintDestructor() {}
+        PyPrintDestructor() = default;
         ~PyPrintDestructor() {
             py::print("Print from destructor");
         }
diff --git a/tests/test_copy_move.cpp b/tests/test_copy_move.cpp
index 34f1c61..05d5c47 100644
--- a/tests/test_copy_move.cpp
+++ b/tests/test_copy_move.cpp
@@ -19,14 +19,14 @@
 };
 
 struct lacking_copy_ctor : public empty<lacking_copy_ctor> {
-    lacking_copy_ctor() {}
+    lacking_copy_ctor() = default;
     lacking_copy_ctor(const lacking_copy_ctor& other) = delete;
 };
 
 template <> lacking_copy_ctor empty<lacking_copy_ctor>::instance_ = {};
 
 struct lacking_move_ctor : public empty<lacking_move_ctor> {
-    lacking_move_ctor() {}
+    lacking_move_ctor() = default;
     lacking_move_ctor(const lacking_move_ctor& other) = delete;
     lacking_move_ctor(lacking_move_ctor&& other) = delete;
 };
diff --git a/tests/test_smart_ptr.cpp b/tests/test_smart_ptr.cpp
index 512175e..60c2e69 100644
--- a/tests/test_smart_ptr.cpp
+++ b/tests/test_smart_ptr.cpp
@@ -339,7 +339,7 @@
     // test_shared_ptr_gc
     // #187: issue involving std::shared_ptr<> return value policy & garbage collection
     struct ElementBase {
-        virtual ~ElementBase() { } /* Force creation of virtual table */
+        virtual ~ElementBase() = default; /* Force creation of virtual table */
         ElementBase() = default;
         ElementBase(const ElementBase&) = delete;
     };
diff --git a/tests/test_virtual_functions.cpp b/tests/test_virtual_functions.cpp
index 7a41756..baea1e5 100644
--- a/tests/test_virtual_functions.cpp
+++ b/tests/test_virtual_functions.cpp
@@ -129,7 +129,7 @@
 
 class NCVirt {
 public:
-    virtual ~NCVirt() { }
+    virtual ~NCVirt() = default;
     NCVirt() = default;
     NCVirt(const NCVirt&) = delete;
     virtual NonCopyable get_noncopyable(int a, int b) { return NonCopyable(a, b); }
@@ -227,7 +227,7 @@
     struct A {
         A() = default;
         A(const A&) = delete;
-        virtual ~A() {}
+        virtual ~A() = default;
         virtual void f() { py::print("A.f()"); }
     };
 
@@ -255,7 +255,7 @@
     struct A2 {
         A2() = default;
         A2(const A2&) = delete;
-        virtual ~A2() {}
+        virtual ~A2() = default;
         virtual void f() { py::print("A2.f()"); }
     };