diff --git a/.gitignore b/.gitignore
index 54c65a830c..d6e2f8f57d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,27 +1,30 @@
 # general
 apidocs
 .kdev4
 build
 *~
 *.bak
 *.orig
 *.pyc
 *.rej
 doxygen.log
 Doxyfile
 *.kdevelop
 *.kdevelop.filelist
 *.kdevelop.pcs
 *.kdevses
 .*kate-swp
 build/
 mem.log.*
 massif.*
 callgrind.*
 perf.data*
 
 # from kdiff3
 *.BACKUP.*
 *.BASE.*
 *.LOCAL.*
 *.REMOTE.*
+
+# do not ignore .kdev4 files from test data
+!projectmanagers/custom-buildsystem/tests/projects/**/.kdev4
diff --git a/projectmanagers/custom-buildsystem/tests/projects/builddirproject/.kdev4/builddirproject.kdev4 b/projectmanagers/custom-buildsystem/tests/projects/builddirproject/.kdev4/builddirproject.kdev4
new file mode 100644
index 0000000000..e0e9b3f625
--- /dev/null
+++ b/projectmanagers/custom-buildsystem/tests/projects/builddirproject/.kdev4/builddirproject.kdev4
@@ -0,0 +1,55 @@
+[Buildset]
+BuildItems=@Variant(\x00\x00\x00\t\x00\x00\x00\x00\x00)
+
+[CustomBuildSystem]
+CurrentConfiguration=BuildConfig0
+
+[CustomBuildSystem][BuildConfig0]
+BuildDir=
+Title=mainbuild
+
+[CustomBuildSystem][BuildConfig0][ToolBuild]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=0
+
+[CustomBuildSystem][BuildConfig0][ToolClean]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=3
+
+[CustomBuildSystem][BuildConfig0][ToolConfigure]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=1
+
+[CustomBuildSystem][BuildConfig0][ToolInstall]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=2
+
+[CustomBuildSystem][BuildConfig0][ToolPrune]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=4
+
+[Defines And Includes][Compiler]
+Name=GCC
+Path=gcc
+Type=GCC
+
+[MakeBuilder]
+Number Of Jobs=1
+
+[Project]
+VersionControlSupport=kdevgit
diff --git a/projectmanagers/custom-buildsystem/tests/projects/multipathproject/.kdev4/multipathproject.kdev4 b/projectmanagers/custom-buildsystem/tests/projects/multipathproject/.kdev4/multipathproject.kdev4
new file mode 100644
index 0000000000..8f045a1b6a
--- /dev/null
+++ b/projectmanagers/custom-buildsystem/tests/projects/multipathproject/.kdev4/multipathproject.kdev4
@@ -0,0 +1,45 @@
+[Buildset]
+BuildItems=@Variant(\x00\x00\x00\t\x00\x00\x00\x00\x01\x00\x00\x00\x0b\x00\x00\x00\x00\x01\x00\x00\x00 \x00M\x00u\x00l\x00t\x00i\x00P\x00a\x00t\x00h\x00P\x00r\x00o\x00j\x00e\x00c\x00t)
+
+[CustomBuildSystem]
+CurrentConfiguration=BuildConfig0
+
+[CustomBuildSystem][BuildConfig0]
+BuildDir=file:///home/andreas/projects/testcustom/build2
+Title=main
+
+[CustomBuildSystem][BuildConfig0][ToolBuild]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=0
+
+[CustomBuildSystem][BuildConfig0][ToolClean]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=3
+
+[CustomBuildSystem][BuildConfig0][ToolConfigure]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=1
+
+[CustomBuildSystem][BuildConfig0][ToolInstall]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=2
+
+[Defines And Includes][Compiler]
+Name=GCC
+Path=gcc
+Type=GCC
+
+[Project]
+VersionControlSupport=
diff --git a/projectmanagers/custom-buildsystem/tests/projects/simpleproject/.kdev4/simpleproject.kdev4 b/projectmanagers/custom-buildsystem/tests/projects/simpleproject/.kdev4/simpleproject.kdev4
new file mode 100644
index 0000000000..9e884ea46b
--- /dev/null
+++ b/projectmanagers/custom-buildsystem/tests/projects/simpleproject/.kdev4/simpleproject.kdev4
@@ -0,0 +1,45 @@
+[Buildset]
+BuildItems=@Variant(\x00\x00\x00\t\x00\x00\x00\x00\x01\x00\x00\x00\x0b\x00\x00\x00\x00\x01\x00\x00\x00\x1a\x00S\x00i\x00m\x00p\x00l\x00e\x00P\x00r\x00o\x00j\x00e\x00c\x00t)
+
+[CustomBuildSystem]
+CurrentConfiguration=BuildConfig0
+
+[CustomBuildSystem][BuildConfig0]
+BuildDir=file:///home/andreas/projects/testcustom/build
+Title=mainbuild
+
+[CustomBuildSystem][BuildConfig0][ToolBuild]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=0
+
+[CustomBuildSystem][BuildConfig0][ToolClean]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=3
+
+[CustomBuildSystem][BuildConfig0][ToolConfigure]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=1
+
+[CustomBuildSystem][BuildConfig0][ToolInstall]
+Arguments=
+Enabled=false
+Environment=
+Executable=
+Type=2
+
+[Defines And Includes][Compiler]
+Name=GCC
+Path=gcc
+Type=GCC
+
+[Project]
+VersionControlSupport=