diff --git a/src/Avalonia.Visuals/Media/Fonts/FontFamilyKey.cs b/src/Avalonia.Visuals/Media/Fonts/FontFamilyKey.cs
index 76ee2b7aad..7733dd7d2a 100644
--- a/src/Avalonia.Visuals/Media/Fonts/FontFamilyKey.cs
+++ b/src/Avalonia.Visuals/Media/Fonts/FontFamilyKey.cs
@@ -95,7 +95,7 @@ namespace Avalonia.Media.Fonts
         {
             if (!Source.IsAbsoluteUri && BaseUri != null)
             {
-                return BaseUri.Authority + Source;
+                return BaseUri.AbsoluteUri + Source.OriginalString;
             }
 
             return Source.ToString();
diff --git a/tests/Avalonia.Visuals.UnitTests/Media/FontFamilyTests.cs b/tests/Avalonia.Visuals.UnitTests/Media/FontFamilyTests.cs
index 1cd1742f32..75ae43a1fa 100644
--- a/tests/Avalonia.Visuals.UnitTests/Media/FontFamilyTests.cs
+++ b/tests/Avalonia.Visuals.UnitTests/Media/FontFamilyTests.cs
@@ -28,7 +28,7 @@ namespace Avalonia.Visuals.UnitTests.Media
         }
 
         [Fact]
-        public void Parse_Parses_FontFamily_With_Name()
+        public void Should_Parse_FontFamily_With_SystemFont_Name()
         {
             var fontFamily = FontFamily.Parse("Courier New");
 
@@ -36,7 +36,7 @@ namespace Avalonia.Visuals.UnitTests.Media
         }
 
         [Fact]
-        public void Parse_Parses_FontFamily_With_Names()
+        public void Should_Parse_FontFamily_With_Fallbacks()
         {
             var fontFamily = FontFamily.Parse("Courier New, Times New Roman");
 
@@ -48,7 +48,7 @@ namespace Avalonia.Visuals.UnitTests.Media
         }
 
         [Fact]
-        public void Parse_Parses_FontFamily_With_Resource_Folder()
+        public void Should_Parse_FontFamily_With_Resource_Folder()
         {
             var source = new Uri("resm:Avalonia.Visuals.UnitTests#MyFont");
 
@@ -62,7 +62,7 @@ namespace Avalonia.Visuals.UnitTests.Media
         }
 
         [Fact]
-        public void Parse_Parses_FontFamily_With_Resource_Filename()
+        public void Should_Parse_FontFamily_With_Resource_Filename()
         {
             var source = new Uri("resm:Avalonia.Visuals.UnitTests.MyFont.ttf#MyFont");
 
@@ -74,5 +74,32 @@ namespace Avalonia.Visuals.UnitTests.Media
 
             Assert.Equal(key, fontFamily.Key);
         }
+
+        [Theory]
+        [InlineData("resm:Avalonia.Visuals.UnitTests/Assets/Fonts#MyFont")]
+        [InlineData("avares://Avalonia.Visuals.UnitTests/Assets/Fonts#MyFont")]
+        public void Should_Create_FontFamily_From_Uri(string name)
+        {
+            var fontFamily = new FontFamily(name);
+
+            Assert.Equal("MyFont", fontFamily.Name);
+
+            Assert.NotNull(fontFamily.Key);
+        }
+
+        [Theory]
+        [InlineData("resm:Avalonia.Visuals.UnitTests.Assets.Fonts", "#MyFont")]
+        [InlineData("avares://Avalonia.Visuals.UnitTests/Assets/Fonts", "#MyFont")]
+        [InlineData("avares://Avalonia.Visuals.UnitTests", "/Assets/Fonts#MyFont")]
+        public void Should_Create_FontFamily_From_Uri_With_Base_Uri(string @base, string name)
+        {
+            var baseUri = new Uri(@base);
+
+            var fontFamily = new FontFamily(baseUri, name);
+
+            Assert.Equal("MyFont", fontFamily.Name);
+
+            Assert.NotNull(fontFamily.Key);
+        }
     }
 }