diff --git a/test/integration/lib.rb b/test/integration/lib.rb
index 824b0eb..5323f1c 100644
--- a/test/integration/lib.rb
+++ b/test/integration/lib.rb
@@ -37,6 +37,8 @@ class Project
     @build_dir = build_dir
   end
 
+  attr :src_dir, :build_dir
+
   def create_file(target_path, text)
     target_path = File.join(@src_dir, target_path)
     File.write target_path, text
@@ -47,9 +49,9 @@ class Project
     raise "#{source_path} doesn't exist" if !File.file?(source_path)
 
     # tweak args
-    args[:cpm_path] = TestLib::CPM_PATH
+    args[:cpm_path] = TestLib::CPM_PATH if !args[:cpm_path]
     args[:packages] = [args[:package]] if args[:package] # if args contain package, create the array
-    args[:packages] = args[:packages].join("\n") # join all packages
+    args[:packages] = args[:packages].join("\n") if args[:packages] # join all packages if any
 
     src_text = File.read source_path
     create_file target_path, src_text % args
@@ -147,6 +149,11 @@ class IntegrationTest < Test::Unit::TestCase
     assert_block(msg) { res.status.success? }
   end
 
+  def assert_same_path(a, b)
+    msg = build_message(nil, "<?> expected but was\n<?>", a, b)
+    assert_block(msg) { File.identical? a, b }
+  end
+
   # utils
 
   def make_project(template_dir = nil)
diff --git a/test/integration/templates/no-deps/lists.in.cmake b/test/integration/templates/no-deps/lists.in.cmake
new file mode 100644
index 0000000..ae4e136
--- /dev/null
+++ b/test/integration/templates/no-deps/lists.in.cmake
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+project(no-deps)
+
+include("%{cpm_path}")
+
+add_executable(no-deps main.c)
diff --git a/test/integration/templates/no-deps/main.c b/test/integration/templates/no-deps/main.c
new file mode 100644
index 0000000..d7f6d64
--- /dev/null
+++ b/test/integration/templates/no-deps/main.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main() {
+    puts("Hello");
+    return 0;
+}
diff --git a/test/integration/test_basics.rb b/test/integration/test_basics.rb
new file mode 100644
index 0000000..c6e941d
--- /dev/null
+++ b/test/integration/test_basics.rb
@@ -0,0 +1,42 @@
+require_relative './lib'
+
+class Basics < IntegrationTest
+  # test cpm coherency with no cpm-related env vars
+  def test_cpm_default
+    prj = make_project 'no-deps'
+    prj.create_lists_with({})
+    cfg_result = prj.configure
+    assert_success cfg_result
+
+    @cache = prj.read_cache
+
+    assert_empty @cache.packages
+
+    assert_same_path TestLib::CPM_PATH, check_and_get('CPM_FILE')
+    assert_same_path File.dirname(TestLib::CPM_PATH), check_and_get('CPM_DIRECTORY')
+
+    assert_equal 'OFF', check_and_get('CPM_DRY_RUN')
+    assert_equal 'CPM:', check_and_get('CPM_INDENT')
+    assert_equal '1.0.0-development-version', check_and_get('CPM_VERSION')
+
+    assert_equal 'OFF', check_and_get('CPM_SOURCE_CACHE', 'PATH')
+    assert_equal 'OFF', check_and_get('CPM_DOWNLOAD_ALL', 'BOOL')
+    assert_equal 'OFF', check_and_get('CPM_LOCAL_PACKAGES_ONLY', 'BOOL')
+    assert_equal 'OFF', check_and_get('CPM_USE_LOCAL_PACKAGES', 'BOOL')
+    assert_equal 'OFF', check_and_get('CPM_USE_NAMED_CACHE_DIRECTORIES', 'BOOL')
+
+    assert_equal 'OFF', check_and_get('CPM_DONT_CREATE_PACKAGE_LOCK', 'BOOL')
+    assert_equal 'OFF', check_and_get('CPM_INCLUDE_ALL_IN_PACKAGE_LOCK', 'BOOL')
+    assert_same_path File.join(prj.build_dir, 'cpm-package-lock.cmake'), check_and_get('CPM_PACKAGE_LOCK_FILE')
+
+    assert_equal 'OFF', check_and_get('CPM_DONT_UPDATE_MODULE_PATH', 'BOOL')
+    assert_same_path File.join(prj.build_dir, 'CPM_modules'), check_and_get('CPM_MODULE_PATH')
+  end
+
+  def check_and_get(key, type = 'INTERNAL')
+    e = @cache.entries[key]
+    assert_not_nil e, key
+    assert_equal type, e.type, key
+    e.val
+  end
+end
diff --git a/test/integration/test_simple.rb b/test/integration/test_simple.rb
index 55374ed..80ca7ef 100644
--- a/test/integration/test_simple.rb
+++ b/test/integration/test_simple.rb
@@ -3,7 +3,7 @@ require_relative './lib'
 class Simple < IntegrationTest
   P_ADDER = 'testpack-adder'
 
-  def test_basics
+  def test_add_remove_packages
     prj = make_project 'using-adder'
 
     prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-adder#cad1cd4b4cdf957c5b59e30bc9a1dd200dbfc716")'