diff --git a/docs/test_cases.md b/docs/test_cases.md
index 1f0e4c0d..2b5459d5 100644
--- a/docs/test_cases.md
+++ b/docs/test_cases.md
@@ -43,5 +43,6 @@
  * [t30004](./test_cases/t30004.md) - PlantUML package decorators test case
  * [t30005](./test_cases/t30005.md) - Package namespace alias test case
  * [t30006](./test_cases/t30006.md) - Package split namespace test case
+ * [t30007](./test_cases/t30007.md) - Package diagram layout hints test case
 ## Configuration diagrams
  * [t90000](./test_cases/t90000.md) - Basic config test
diff --git a/docs/test_cases/t00006.md b/docs/test_cases/t00006.md
index 7e7ade96..44b3d036 100644
--- a/docs/test_cases/t00006.md
+++ b/docs/test_cases/t00006.md
@@ -18,6 +18,7 @@ diagrams:
 ## Source code
 File t00006.cc
 ```cpp
+#include <array>
 #include <map>
 #include <vector>
 
diff --git a/docs/test_cases/t00017.md b/docs/test_cases/t00017.md
index 503dacac..b673c436 100644
--- a/docs/test_cases/t00017.md
+++ b/docs/test_cases/t00017.md
@@ -19,6 +19,8 @@ diagrams:
 ## Source code
 File t00017.cc
 ```cpp
+#include <utility>
+
 namespace clanguml {
 namespace t00017 {
 class A {
@@ -55,6 +57,15 @@ class K {
 };
 
 class R {
+    explicit R(int &some_int, C &cc, const E &ee, F &&ff, I *&ii)
+        : some_int_reference{some_int}
+        , c{cc}
+        , e{ee}
+        , f{std::move(ff)}
+        , i{ii}
+    {
+    }
+
 private:
     int some_int;
     int *some_int_pointer;
@@ -64,7 +75,7 @@ private:
     B *b;
     C &c;
     const D *d;
-    const E &e{};
+    const E &e;
     F &&f;
     G **g;
     H ***h;
diff --git a/docs/test_cases/t00017_class.png b/docs/test_cases/t00017_class.png
index cea9349a..b1cfc0a8 100644
Binary files a/docs/test_cases/t00017_class.png and b/docs/test_cases/t00017_class.png differ
diff --git a/docs/test_cases/t00028.md b/docs/test_cases/t00028.md
index 6dc6a928..b5300352 100644
--- a/docs/test_cases/t00028.md
+++ b/docs/test_cases/t00028.md
@@ -59,6 +59,11 @@ enum class F { one, two, three };
 
 /// \uml{note[right] R class note.}
 class R {
+    explicit R(C &c)
+        : ccc(c)
+    {
+    }
+
     A aaa;
 
     B *bbb;
diff --git a/docs/test_cases/t00028_class.png b/docs/test_cases/t00028_class.png
index b0fc2c7b..d11d4e73 100644
Binary files a/docs/test_cases/t00028_class.png and b/docs/test_cases/t00028_class.png differ
diff --git a/tests/test_cases.yaml b/tests/test_cases.yaml
index 7c3bdf30..399dd654 100644
--- a/tests/test_cases.yaml
+++ b/tests/test_cases.yaml
@@ -125,6 +125,9 @@ test_cases:
     - name: t30006
       title: Package split namespace test case
       description:
+    - name: t30007
+      title: Package diagram layout hints test case
+      description:
   Configuration diagrams:
     - name: t90000
       title: Basic config test