diff --git a/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.cs b/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.cs
new file mode 100644
index 000000000..254d5cbf0
--- /dev/null
+++ b/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.cs
@@ -0,0 +1,55 @@
+// Copyright (c) ZeroC, Inc.
+
+using NUnit.Framework;
+
+namespace IceRpc.Ice.Generator.Base.Tests;
+
+public class ConstTests
+{
+    [TestCase(ConstBool.Value, true)]
+    [TestCase(ConstInt.Value, 3)]
+    [TestCase(ConstLong.Value, 4L)]
+    [TestCase(ConstFloat.Value, 5.1F)]
+    [TestCase(ConstDouble.Value, 6.2D)]
+    public void Const_has_the_expected_value(object value, object expected) =>
+        Assert.That(value, Is.EqualTo(expected));
+
+    [Test]
+    public void Byte_const_has_the_expected_value() =>
+        Assert.That(ConstByte.Value, Is.EqualTo((byte)254));
+
+    [Test]
+    public void Short_const_has_the_expected_value() =>
+        Assert.That(ConstShort.Value, Is.EqualTo((short)16000));
+
+    [Test]
+    public void String_const_preserves_escape_sequences()
+    {
+        Assert.That(ConstString.Value, Does.StartWith("foo"));
+        Assert.That(ConstString.Value, Does.Contain("\\"));   // literal backslash
+        Assert.That(ConstString.Value, Does.Contain("\""));   // literal double-quote
+        Assert.That(ConstString.Value, Does.Contain("\n"));   // newline
+        Assert.That(ConstString.Value, Does.Contain("\t"));   // tab
+        Assert.That(ConstString.Value, Does.Contain("\a"));   // bell (from \007 and \x07)
+    }
+
+    [TestCase(ConstColor1.Value, Color.Red)]
+    [TestCase(ConstColor2.Value, Color.Green)]
+    [TestCase(ConstColor3.Value, Color.Blue)]
+    public void Enum_const_has_the_expected_value(Color value, Color expected) =>
+        Assert.That(value, Is.EqualTo(expected));
+
+    [TestCase(ConstNestedColor1.Value, Nested.Color.Red)]
+    [TestCase(ConstNestedColor2.Value, Nested.Color.Green)]
+    [TestCase(ConstNestedColor3.Value, Nested.Color.Blue)]
+    public void Nested_enum_const_has_the_expected_value(Nested.Color value, Nested.Color expected) =>
+        Assert.That(value, Is.EqualTo(expected));
+
+    [Test]
+    public void Alias_const_has_the_same_value_as_referenced_const()
+    {
+        Assert.That(ConstFloatAlias.Value, Is.EqualTo((double)ConstFloat.Value));
+        Assert.That(ConstColor2Alias.Value, Is.EqualTo(ConstColor2.Value));
+        Assert.That(ConstNestedColor2Alias.Value, Is.EqualTo(ConstNestedColor2.Value));
+    }
+}
diff --git a/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.ice b/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.ice
new file mode 100644
index 000000000..2b8aa6169
--- /dev/null
+++ b/tests/IceRpc.Ice.Generator.Base.Tests/ConstTests.ice
@@ -0,0 +1,42 @@
+// Copyright (c) ZeroC, Inc.
+
+#pragma once
+
+module IceRpc::Ice::Generator::Base::Tests
+{
+    enum Color { red, green, blue }
+
+    module Nested
+    {
+        enum Color { red, green, blue }
+    }
+
+    /// My bool constant.
+    const bool ConstBool = true;
+
+    const byte ConstByte = 254;
+    const short ConstShort = 16000;
+    const int ConstInt = 3;
+    const long ConstLong = 4;
+    const float ConstFloat = 5.1;
+    const double ConstDouble = 6.2;
+    const double ConstFloatAlias = ConstFloat;
+
+    const string ConstString = "foo \\ \"bar\n \r\n\t\v\f\a\b\? \007 \x07";
+
+    const Color ConstColor1 = ::IceRpc::Ice::Generator::Base::Tests::Color::red;
+    const Color ConstColor2 = Tests::green;
+    const Color ConstColor3 = blue;
+    const Color ConstColor2Alias = ConstColor2;
+    const Nested::Color ConstNestedColor1 = Tests::Nested::Color::red;
+    const Nested::Color ConstNestedColor2 = Tests::Nested::green;
+    const Nested::Color ConstNestedColor3 = blue;
+    const Nested::Color ConstNestedColor2Alias = ConstNestedColor2;
+
+    const int ConstZeroI = 0;
+    const long ConstZeroL = 0;
+    const float ConstZeroF = 0;
+    const float ConstZeroDotF = 0.0;
+    const double ConstZeroD = 0;
+    const double ConstZeroDotD = 0.0;
+}
diff --git a/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.cs b/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.cs
new file mode 100644
index 000000000..96b4c6751
--- /dev/null
+++ b/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.cs
@@ -0,0 +1,153 @@
+// Copyright (c) ZeroC, Inc.
+
+using NUnit.Framework;
+
+namespace IceRpc.Ice.Generator.Base.Tests;
+
+public class DefaultValueTests
+{
+    [Test]
+    public void Struct_field_has_expected_default_value()
+    {
+        var p = new Point();
+        Assert.That(p.X, Is.EqualTo(0));
+        Assert.That(p.Y, Is.EqualTo(42));
+    }
+
+    [Test]
+    public void Struct_fields_have_expected_default_values()
+    {
+        var s = new StructWithDefaultValues { NoDefault = "hello" };
+
+        Assert.That(s.BoolFalse, Is.False);
+        Assert.That(s.BoolTrue, Is.True);
+        Assert.That(s.B, Is.EqualTo((byte)254));
+        Assert.That(s.S, Is.EqualTo((short)16000));
+        Assert.That(s.I, Is.EqualTo(3));
+        Assert.That(s.L, Is.EqualTo(4L));
+        Assert.That(s.F, Is.EqualTo(5.1F));
+        Assert.That(s.D, Is.EqualTo(6.2D));
+        Assert.That(s.Str, Does.StartWith("foo"));
+        Assert.That(s.Str, Does.Contain("\\"));
+        Assert.That(s.Str, Does.Contain("\n"));
+        Assert.That(s.C1, Is.EqualTo(Color.Red));
+        Assert.That(s.C2, Is.EqualTo(Color.Green));
+        Assert.That(s.C3, Is.EqualTo(Color.Blue));
+        Assert.That(s.Nc1, Is.EqualTo(Nested.Color.Red));
+        Assert.That(s.Nc2, Is.EqualTo(Nested.Color.Green));
+        Assert.That(s.Nc3, Is.EqualTo(Nested.Color.Blue));
+        Assert.That(s.NoDefault, Is.EqualTo("hello"));
+        Assert.That(s.ZeroI, Is.EqualTo(0));
+        Assert.That(s.ZeroL, Is.EqualTo(0L));
+        Assert.That(s.ZeroF, Is.EqualTo(0F));
+        Assert.That(s.ZeroDotF, Is.EqualTo(0F));
+        Assert.That(s.ZeroD, Is.EqualTo(0D));
+        Assert.That(s.ZeroDotD, Is.EqualTo(0D));
+    }
+
+    [Test]
+    public void Class_fields_have_expected_default_values()
+    {
+        var c = new BaseWithDefaultValues { NoDefault = "hello" };
+
+        Assert.That(c.BoolFalse, Is.False);
+        Assert.That(c.BoolTrue, Is.True);
+        Assert.That(c.B, Is.EqualTo((byte)1));
+        Assert.That(c.S, Is.EqualTo((short)2));
+        Assert.That(c.I, Is.EqualTo(3));
+        Assert.That(c.L, Is.EqualTo(4L));
+        Assert.That(c.F, Is.EqualTo(5.1F));
+        Assert.That(c.D, Is.EqualTo(6.2D));
+        Assert.That(c.Str, Does.StartWith("foo"));
+        Assert.That(c.Str, Does.Contain("\\"));
+        Assert.That(c.Str, Does.Contain("\n"));
+        Assert.That(c.NoDefault, Is.EqualTo("hello"));
+        Assert.That(c.ZeroI, Is.EqualTo(0));
+        Assert.That(c.ZeroL, Is.EqualTo(0L));
+        Assert.That(c.ZeroF, Is.EqualTo(0F));
+        Assert.That(c.ZeroDotF, Is.EqualTo(0F));
+        Assert.That(c.ZeroD, Is.EqualTo(0D));
+        Assert.That(c.ZeroDotD, Is.EqualTo(0D));
+
+        // St1 has no default value in Ice, so it's default(StructWithDefaultValues) not new StructWithDefaultValues().
+        Assert.That(c.St1, Is.EqualTo(default(StructWithDefaultValues)));
+        Assert.That(c.St1, Is.Not.EqualTo(new StructWithDefaultValues { NoDefault = "" }));
+    }
+
+    [Test]
+    public void Derived_class_fields_have_expected_default_values()
+    {
+        var d = new DerivedWithDefaultValues { NoDefault = "hello" };
+
+        // Base class fields
+        Assert.That(d.BoolTrue, Is.True);
+        Assert.That(d.I, Is.EqualTo(3));
+
+        // Derived class enum fields
+        Assert.That(d.C1, Is.EqualTo(Color.Red));
+        Assert.That(d.C2, Is.EqualTo(Color.Green));
+        Assert.That(d.C3, Is.EqualTo(Color.Blue));
+        Assert.That(d.Nc1, Is.EqualTo(Nested.Color.Red));
+        Assert.That(d.Nc2, Is.EqualTo(Nested.Color.Green));
+        Assert.That(d.Nc3, Is.EqualTo(Nested.Color.Blue));
+    }
+
+    [Test]
+    public void Exception_fields_have_expected_default_values()
+    {
+        var e = new BaseExceptionWithDefaultValues { NoDefault = "hello" };
+
+        Assert.That(e.BoolFalse, Is.False);
+        Assert.That(e.BoolTrue, Is.True);
+        Assert.That(e.B, Is.EqualTo((byte)1));
+        Assert.That(e.S, Is.EqualTo((short)2));
+        Assert.That(e.I, Is.EqualTo(3));
+        Assert.That(e.L, Is.EqualTo(4L));
+        Assert.That(e.F, Is.EqualTo(5.1F));
+        Assert.That(e.D, Is.EqualTo(6.2D));
+        Assert.That(e.Str, Does.StartWith("foo"));
+        Assert.That(e.Str, Does.Contain("\\"));
+        Assert.That(e.Str, Does.Contain("\n"));
+        Assert.That(e.NoDefault, Is.EqualTo("hello"));
+    }
+
+    [Test]
+    public void Derived_exception_fields_default_to_const_values()
+    {
+        var e = new DerivedExceptionWithDefaultValues { NoDefault = "hello" };
+
+        Assert.That(e.C1, Is.EqualTo(ConstColor1.Value));
+        Assert.That(e.C2, Is.EqualTo(ConstColor2.Value));
+        Assert.That(e.C3, Is.EqualTo(ConstColor3.Value));
+        Assert.That(e.Nc1, Is.EqualTo(ConstNestedColor1.Value));
+        Assert.That(e.Nc2, Is.EqualTo(ConstNestedColor2.Value));
+        Assert.That(e.Nc3, Is.EqualTo(ConstNestedColor3.Value));
+    }
+
+    [Test]
+    public void Struct_fields_default_to_const_values()
+    {
+        var s = new StructWithConstDefaultValues();
+
+        Assert.That(s.BoolTrue, Is.EqualTo(ConstBool.Value));
+        Assert.That(s.B, Is.EqualTo(ConstByte.Value));
+        Assert.That(s.S, Is.EqualTo(ConstShort.Value));
+        Assert.That(s.I, Is.EqualTo(ConstInt.Value));
+        Assert.That(s.L, Is.EqualTo(ConstLong.Value));
+        Assert.That(s.F, Is.EqualTo(ConstFloat.Value));
+        Assert.That(s.D, Is.EqualTo(ConstDouble.Value));
+        Assert.That(s.Str, Is.EqualTo(ConstString.Value));
+        Assert.That(s.C1, Is.EqualTo(ConstColor1.Value));
+        Assert.That(s.C2, Is.EqualTo(ConstColor2.Value));
+        Assert.That(s.C3, Is.EqualTo(ConstColor3.Value));
+        Assert.That(s.Nc1, Is.EqualTo(ConstNestedColor1.Value));
+        Assert.That(s.Nc2, Is.EqualTo(ConstNestedColor2.Value));
+        Assert.That(s.Nc3, Is.EqualTo(ConstNestedColor3.Value));
+        Assert.That(s.ZeroI, Is.EqualTo(ConstZeroI.Value));
+        Assert.That(s.ZeroL, Is.EqualTo(ConstZeroL.Value));
+        Assert.That(s.ZeroF, Is.EqualTo(ConstZeroF.Value));
+        Assert.That(s.ZeroDotF, Is.EqualTo(ConstZeroDotF.Value));
+        Assert.That(s.ZeroD, Is.EqualTo(ConstZeroD.Value));
+        Assert.That(s.ZeroDotD, Is.EqualTo(ConstZeroDotD.Value));
+    }
+}
diff --git a/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.ice b/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.ice
new file mode 100644
index 000000000..f3d8637dc
--- /dev/null
+++ b/tests/IceRpc.Ice.Generator.Base.Tests/DefaultValueTests.ice
@@ -0,0 +1,121 @@
+// Copyright (c) ZeroC, Inc.
+
+#include "ConstTests.ice"
+
+module IceRpc::Ice::Generator::Base::Tests
+{
+    struct Point { int x; int y = 42; }
+
+    struct StructWithDefaultValues
+    {
+        bool boolFalse = false;
+        bool boolTrue = true;
+        byte b = 254;
+        short s = 16000;
+        int i = 3;
+        long l = 4;
+        float f = 5.1;
+        double d = 6.2;
+        string str = "foo \\ \"bar\n \r\n\t\v\f\a\b\? \007 \x07";
+        Color c1 = ::IceRpc::Ice::Generator::Base::Tests::Color::red;
+        Color c2 = Tests::green;
+        Color c3 = blue;
+        Nested::Color nc1 = Tests::Nested::Color::red;
+        Nested::Color nc2 = Nested::green;
+        Nested::Color nc3 = blue;
+        string noDefault;
+        int zeroI = 0;
+        long zeroL = 0;
+        float zeroF = 0;
+        float zeroDotF = 0.0;
+        double zeroD = 0;
+        double zeroDotD = 0.0;
+    }
+
+    struct StructWithConstDefaultValues
+    {
+        bool boolTrue = ConstBool;
+        byte b = ConstByte;
+        short s = ConstShort;
+        int i = ConstInt;
+        long l = ConstLong;
+        float f = ConstFloat;
+        double d = ConstDouble;
+        string str = ConstString;
+        Color c1 = ConstColor1;
+        Color c2 = ConstColor2;
+        Color c3 = ConstColor3;
+        Nested::Color nc1 = ConstNestedColor1;
+        Nested::Color nc2 = ConstNestedColor2;
+        Nested::Color nc3 = ConstNestedColor3;
+        int zeroI = ConstZeroI;
+        long zeroL = ConstZeroL;
+        float zeroF = ConstZeroF;
+        float zeroDotF = ConstZeroDotF;
+        double zeroD = ConstZeroD;
+        double zeroDotD = ConstZeroDotD;
+    }
+
+    class BaseWithDefaultValues
+    {
+        bool boolFalse = false;
+        bool boolTrue = true;
+        byte b = 1;
+        short s = 2;
+        int i = 3;
+        long l = 4;
+        float f = 5.1;
+        double d = 6.2;
+        string str = "foo \\ \"bar\n \r\n\t\v\f\a\b\? \007 \x07";
+        string noDefault;
+        int zeroI = 0;
+        long zeroL = 0;
+        float zeroF = 0;
+        float zeroDotF = 0.0;
+        double zeroD = 0;
+        double zeroDotD = 0.0;
+        StructWithDefaultValues st1;
+    }
+
+    class DerivedWithDefaultValues extends BaseWithDefaultValues
+    {
+        Color c1 = ::IceRpc::Ice::Generator::Base::Tests::Color::red;
+        Color c2 = Tests::green;
+        Color c3 = blue;
+
+        Nested::Color nc1 = Tests::Nested::Color::red;
+        Nested::Color nc2 = Nested::green;
+        Nested::Color nc3 = blue;
+    }
+
+    exception BaseExceptionWithDefaultValues
+    {
+        bool boolFalse = false;
+        bool boolTrue = true;
+        byte b = 1;
+        short s = 2;
+        int i = 3;
+        long l = 4;
+        float f = 5.1;
+        double d = 6.2;
+        string str = "foo \\ \"bar\n \r\n\t\v\f\a\b\? \007 \x07";
+        string noDefault;
+        int zeroI = 0;
+        long zeroL = 0;
+        float zeroF = 0;
+        float zeroDotF = 0.0;
+        double zeroD = 0;
+        double zeroDotD = 0.0;
+    }
+
+    exception DerivedExceptionWithDefaultValues extends BaseExceptionWithDefaultValues
+    {
+        Color c1 = ConstColor1;
+        Color c2 = ConstColor2;
+        Color c3 = ConstColor3;
+
+        Nested::Color nc1 = ConstNestedColor1;
+        Nested::Color nc2 = ConstNestedColor2;
+        Nested::Color nc3 = ConstNestedColor3;
+    }
+}