diff --git a/src/Chapter01.Tests/Chapter01.Tests.csproj b/src/Chapter01.Tests/Chapter01.Tests.csproj
index 2485b92b2..bd426b9cf 100644
--- a/src/Chapter01.Tests/Chapter01.Tests.csproj
+++ b/src/Chapter01.Tests/Chapter01.Tests.csproj
@@ -17,7 +17,7 @@
-
+
diff --git a/src/Chapter02.Tests/Chapter02.Tests.csproj b/src/Chapter02.Tests/Chapter02.Tests.csproj
index 56e0e9e6d..71e5faff3 100644
--- a/src/Chapter02.Tests/Chapter02.Tests.csproj
+++ b/src/Chapter02.Tests/Chapter02.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter03.Tests/Chapter03.Tests.csproj b/src/Chapter03.Tests/Chapter03.Tests.csproj
index 27587595f..209b116a8 100644
--- a/src/Chapter03.Tests/Chapter03.Tests.csproj
+++ b/src/Chapter03.Tests/Chapter03.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter04.Tests/Chapter04.Tests.csproj b/src/Chapter04.Tests/Chapter04.Tests.csproj
index 71f24d28f..2013eed16 100644
--- a/src/Chapter04.Tests/Chapter04.Tests.csproj
+++ b/src/Chapter04.Tests/Chapter04.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter05.Tests/Chapter05.Tests.csproj b/src/Chapter05.Tests/Chapter05.Tests.csproj
index e576552cf..2f3d6460d 100644
--- a/src/Chapter05.Tests/Chapter05.Tests.csproj
+++ b/src/Chapter05.Tests/Chapter05.Tests.csproj
@@ -24,7 +24,7 @@
-
+
diff --git a/src/Chapter07.Tests/Chapter07.Tests.csproj b/src/Chapter07.Tests/Chapter07.Tests.csproj
index 47e00cdd0..8a880d561 100644
--- a/src/Chapter07.Tests/Chapter07.Tests.csproj
+++ b/src/Chapter07.Tests/Chapter07.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter08.Tests/Chapter08.Tests.csproj b/src/Chapter08.Tests/Chapter08.Tests.csproj
index 9f2334047..c81341738 100644
--- a/src/Chapter08.Tests/Chapter08.Tests.csproj
+++ b/src/Chapter08.Tests/Chapter08.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter09.Tests/Chapter09.Tests.csproj b/src/Chapter09.Tests/Chapter09.Tests.csproj
index b8a1a33d4..df796b7ff 100644
--- a/src/Chapter09.Tests/Chapter09.Tests.csproj
+++ b/src/Chapter09.Tests/Chapter09.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter10.Tests/Chapter10.Tests.csproj b/src/Chapter10.Tests/Chapter10.Tests.csproj
index 300c5751c..04a0ae43b 100644
--- a/src/Chapter10.Tests/Chapter10.Tests.csproj
+++ b/src/Chapter10.Tests/Chapter10.Tests.csproj
@@ -17,7 +17,7 @@
-
+
diff --git a/src/Chapter11.Tests/Chapter11.Tests.csproj b/src/Chapter11.Tests/Chapter11.Tests.csproj
index 32211f089..70ecf0316 100644
--- a/src/Chapter11.Tests/Chapter11.Tests.csproj
+++ b/src/Chapter11.Tests/Chapter11.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter12.Tests/Chapter12.Tests.csproj b/src/Chapter12.Tests/Chapter12.Tests.csproj
index 5037fc13e..81e849997 100644
--- a/src/Chapter12.Tests/Chapter12.Tests.csproj
+++ b/src/Chapter12.Tests/Chapter12.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter13.Tests/Chapter13.Tests.csproj b/src/Chapter13.Tests/Chapter13.Tests.csproj
index 4818efa61..dac06130a 100644
--- a/src/Chapter13.Tests/Chapter13.Tests.csproj
+++ b/src/Chapter13.Tests/Chapter13.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter14.Tests/Chapter14.Tests.csproj b/src/Chapter14.Tests/Chapter14.Tests.csproj
index b1d804c55..1cf293bfb 100644
--- a/src/Chapter14.Tests/Chapter14.Tests.csproj
+++ b/src/Chapter14.Tests/Chapter14.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter15.Tests/Chapter15.Tests.csproj b/src/Chapter15.Tests/Chapter15.Tests.csproj
index 2701c0a15..253d3233e 100644
--- a/src/Chapter15.Tests/Chapter15.Tests.csproj
+++ b/src/Chapter15.Tests/Chapter15.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter16.Tests/Chapter16.Tests.csproj b/src/Chapter16.Tests/Chapter16.Tests.csproj
index 8e4b2b878..7069edc71 100644
--- a/src/Chapter16.Tests/Chapter16.Tests.csproj
+++ b/src/Chapter16.Tests/Chapter16.Tests.csproj
@@ -16,7 +16,7 @@
-
+
diff --git a/src/Chapter17.Tests/Chapter17.Tests.csproj b/src/Chapter17.Tests/Chapter17.Tests.csproj
index 3a0eee478..45bd10101 100644
--- a/src/Chapter17.Tests/Chapter17.Tests.csproj
+++ b/src/Chapter17.Tests/Chapter17.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter18.Tests/Chapter18.Tests.csproj b/src/Chapter18.Tests/Chapter18.Tests.csproj
index 8fc9a9299..f85de678e 100644
--- a/src/Chapter18.Tests/Chapter18.Tests.csproj
+++ b/src/Chapter18.Tests/Chapter18.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter19.Tests/Chapter19.Tests.csproj b/src/Chapter19.Tests/Chapter19.Tests.csproj
index be347c79d..a883b41cc 100644
--- a/src/Chapter19.Tests/Chapter19.Tests.csproj
+++ b/src/Chapter19.Tests/Chapter19.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter20.Tests/Chapter20.Tests.csproj b/src/Chapter20.Tests/Chapter20.Tests.csproj
index ff4fad863..6d0d79849 100644
--- a/src/Chapter20.Tests/Chapter20.Tests.csproj
+++ b/src/Chapter20.Tests/Chapter20.Tests.csproj
@@ -12,7 +12,7 @@
-
+
diff --git a/src/Chapter21.Tests/Chapter21.Tests.csproj b/src/Chapter21.Tests/Chapter21.Tests.csproj
index 345a8d418..723d949d6 100644
--- a/src/Chapter21.Tests/Chapter21.Tests.csproj
+++ b/src/Chapter21.Tests/Chapter21.Tests.csproj
@@ -12,7 +12,7 @@
-
+
diff --git a/src/Chapter22.Tests/Chapter22.Tests.csproj b/src/Chapter22.Tests/Chapter22.Tests.csproj
index 4a8875be5..9c02b39d5 100644
--- a/src/Chapter22.Tests/Chapter22.Tests.csproj
+++ b/src/Chapter22.Tests/Chapter22.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/Chapter23.Tests/Chapter23.Tests.csproj b/src/Chapter23.Tests/Chapter23.Tests.csproj
index c0f969742..b9e02c109 100644
--- a/src/Chapter23.Tests/Chapter23.Tests.csproj
+++ b/src/Chapter23.Tests/Chapter23.Tests.csproj
@@ -13,7 +13,7 @@
-
+
diff --git a/src/ChapterTests.props b/src/ChapterTests.props
index 6fae45f2a..cdb949ea0 100644
--- a/src/ChapterTests.props
+++ b/src/ChapterTests.props
@@ -10,7 +10,7 @@
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all