diff --git a/.drone.yml b/.drone.yml
index c572a06..651f62e 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -32,13 +32,13 @@ steps:
   - cmake -G "Unix Makefiles" -DWITH_TESTS=YES ..
   - make VERBOSE=1
   - make install DESTDIR=install
-  - cd tests && ctest -V
+  - ctest -V
   - cd ../../
   - rm -rf build && mkdir -p build && cd build
   - CXX="clang++" cmake -G "Unix Makefiles" -DWITH_TESTS=YES ..
   - make VERBOSE=1
   - make install DESTDIR=install
-  - cd tests && ctest -V
+  - ctest -V
   volumes:
   - name: debian-package-cache
     path: /var/cache/apt/archives
@@ -73,13 +73,13 @@ steps:
   - cmake -G "Unix Makefiles" -DWITH_TESTS=YES ..
   - make VERBOSE=1
   - make install DESTDIR=install
-  - cd tests && ctest -V
+  - ctest -V
   - cd ../../
   - rm -rf build && mkdir -p build && cd build
   - CXX="clang++" cmake -G "Unix Makefiles" -DWITH_TESTS=YES ..
   - make VERBOSE=1
   - make install DESTDIR=install
-  - cd tests && ctest -V
+  - ctest -V
   volumes:
   - name: debian-package-cache
     path: /var/cache/apt/archives
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0162c46..e24de87 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,6 +46,7 @@ find_package(nlohmann_json REQUIRED CONFIG)
 add_subdirectory(src)
 
 if(WITH_TESTS)
+  include(CTest)
   add_subdirectory(tests)
 endif()
 
diff --git a/README.adoc b/README.adoc
index c42613c..2e6a72f 100644
--- a/README.adoc
+++ b/README.adoc
@@ -132,8 +132,8 @@ cmake -S . -B build
 cmake --build build --parallel $(nproc --ignore=1)
 --------------------------------------------------------------------------------
 
-To install, run `sudo cmake --install build`. To run the tests, run `cd
-build/tests && ctest`.
+To install, run `sudo cmake --install build`. To run the tests, run `ctest
+--test-dir build`.
 
 [TIP]
 If you are using Debian or Ubuntu, or a distribution that is derived from these,
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 1ca00f1..2e2baaa 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,5 +1,3 @@
-include(CTest)
-
 file(GLOB sources_tests CONFIGURE_DEPENDS test_*.cpp)
 file(COPY "test.zip" DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
 file(COPY "test.epub2" DESTINATION ${CMAKE_CURRENT_BINARY_DIR})