diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,6 @@
 
 # set some default settings
 enable_testing()
-set(BUILD_TESTING ON)
 
 find_package(ECM 5.15.0  NO_MODULE)
 
@@ -104,7 +103,9 @@
 check_function_exists(statvfs64 HAVE_STATVFS64)
 
 add_subdirectory(src)
-add_subdirectory(testlib)
+if(BUILD_TESTING)
+    add_subdirectory(testlib)
+endif()
 add_subdirectory(examples)
 add_subdirectory(doc)
 
diff --git a/src/datachecker/CMakeLists.txt b/src/datachecker/CMakeLists.txt
--- a/src/datachecker/CMakeLists.txt
+++ b/src/datachecker/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set(datachecker_HDR
     datacheckerthread.h
diff --git a/src/dht/CMakeLists.txt b/src/dht/CMakeLists.txt
--- a/src/dht/CMakeLists.txt
+++ b/src/dht/CMakeLists.txt
@@ -31,4 +31,6 @@
 
 install(FILES ${dht_HDR} DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}/libktorrent/dht COMPONENT Devel)
 
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/src/diskio/CMakeLists.txt b/src/diskio/CMakeLists.txt
--- a/src/diskio/CMakeLists.txt
+++ b/src/diskio/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set(diskio_HDR
     cache.h
diff --git a/src/download/CMakeLists.txt b/src/download/CMakeLists.txt
--- a/src/download/CMakeLists.txt
+++ b/src/download/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set (download_HDR
     chunkdownload.h
diff --git a/src/magnet/CMakeLists.txt b/src/magnet/CMakeLists.txt
--- a/src/magnet/CMakeLists.txt
+++ b/src/magnet/CMakeLists.txt
@@ -6,4 +6,6 @@
 
 install(FILES ${magnet_HDR} DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}/libktorrent/magnet COMPONENT Devel)
 
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/src/mse/CMakeLists.txt b/src/mse/CMakeLists.txt
--- a/src/mse/CMakeLists.txt
+++ b/src/mse/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set(mse_HDR
     encryptedserverauthenticate.h
diff --git a/src/net/CMakeLists.txt b/src/net/CMakeLists.txt
--- a/src/net/CMakeLists.txt
+++ b/src/net/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set(net_HDR
     socks.h
diff --git a/src/peer/CMakeLists.txt b/src/peer/CMakeLists.txt
--- a/src/peer/CMakeLists.txt
+++ b/src/peer/CMakeLists.txt
@@ -21,4 +21,6 @@
 
 install(FILES ${peer_HDR} DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}/libktorrent/peer COMPONENT Devel)
 
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/src/torrent/CMakeLists.txt b/src/torrent/CMakeLists.txt
--- a/src/torrent/CMakeLists.txt
+++ b/src/torrent/CMakeLists.txt
@@ -19,4 +19,6 @@
 
 install(FILES ${torrent_HDR} DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}/libktorrent/torrent COMPONENT Devel)
 
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
@@ -1,4 +1,6 @@
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
 
 set(util_HDR
     autorotatelogjob.h
diff --git a/src/utp/CMakeLists.txt b/src/utp/CMakeLists.txt
--- a/src/utp/CMakeLists.txt
+++ b/src/utp/CMakeLists.txt
@@ -13,4 +13,6 @@
 )
 
 install(FILES ${utp_HDR} DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}/libktorrent/utp COMPONENT Devel)
-add_subdirectory(tests)
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()