diff --git a/test/integration/lib.rb b/test/integration/lib.rb
index 2fad5f6..9363bd7 100644
--- a/test/integration/lib.rb
+++ b/test/integration/lib.rb
@@ -140,6 +140,8 @@ class Project
 end
 
 class IntegrationTest < Test::Unit::TestCase
+  self.test_order = :defined # run tests in order of defintion (as opposed to alphabetical)
+
   def setup
     # Clear existing cpm-related env vars
     TestLib.clear_env
diff --git a/test/integration/test_a_lib.rb b/test/integration/test_a_lib.rb
new file mode 100644
index 0000000..9fd8a3c
--- /dev/null
+++ b/test/integration/test_a_lib.rb
@@ -0,0 +1,20 @@
+require_relative './lib'
+
+# Tests and experiments with the integration test framework itself
+
+class ALib < IntegrationTest
+  def test_zza
+    f = -> {
+      assert_equal 2, 2
+    }
+    f.()
+  end
+
+  def test_b
+    test_foo('xxx')
+  end
+
+  def test_foo(xxx)
+    assert_equal 'xxx', xxx
+  end
+end
diff --git a/test/integration/test_simple.rb b/test/integration/test_simple.rb
index cc203cc..c6bb3f4 100644
--- a/test/integration/test_simple.rb
+++ b/test/integration/test_simple.rb
@@ -4,86 +4,86 @@ class Simple < IntegrationTest
   ADDER_PACKAGE_NAME = 'testpack-adder'
 
   def test_update_single_package
-    @prj = make_project 'using-adder'
+    prj = make_project 'using-adder'
+    adder_cache0 = nil
+    adder_ver_file = nil
 
-    create_with_commit_sha
-    update_to_version_1
-    update_with_option_off_and_build
-  end
+    create_with_commit_sha = -> {
+      prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-adder#cad1cd4b4cdf957c5b59e30bc9a1dd200dbfc716")'
+      assert_success prj.configure
 
-  def create_with_commit_sha
-    @prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-adder#cad1cd4b4cdf957c5b59e30bc9a1dd200dbfc716")'
-    assert_success @prj.configure
+      cache = prj.read_cache
+      assert_equal 1, cache.packages.size
 
-    cache = @prj.read_cache
-    assert_equal 1, cache.packages.size
+      adder_cache = cache.packages[ADDER_PACKAGE_NAME]
+      assert_not_nil adder_cache
+      assert_equal '0', adder_cache.ver
+      assert File.directory? adder_cache.src_dir
+      assert File.directory? adder_cache.bin_dir
 
-    adder_cache = cache.packages[ADDER_PACKAGE_NAME]
-    assert_not_nil adder_cache
-    assert_equal '0', adder_cache.ver
-    assert File.directory? adder_cache.src_dir
-    assert File.directory? adder_cache.bin_dir
+      adder_ver_file = File.join(adder_cache.src_dir, 'version')
+      assert File.file? adder_ver_file
+      assert_equal 'initial', File.read(adder_ver_file).strip
 
-    @adder_ver_file = File.join(adder_cache.src_dir, 'version')
-    assert File.file? @adder_ver_file
-    assert_equal 'initial', File.read(@adder_ver_file).strip
+      # calculated adder values
+      assert_equal 'ON', cache['ADDER_BUILD_EXAMPLES']
+      assert_equal 'ON', cache['ADDER_BUILD_TESTS']
+      assert_equal adder_cache.src_dir, cache['adder_SOURCE_DIR']
+      assert_equal adder_cache.bin_dir, cache['adder_BINARY_DIR']
 
-    # calculated adder values
-    assert_equal 'ON', cache['ADDER_BUILD_EXAMPLES']
-    assert_equal 'ON', cache['ADDER_BUILD_TESTS']
-    assert_equal adder_cache.src_dir, cache['adder_SOURCE_DIR']
-    assert_equal adder_cache.bin_dir, cache['adder_BINARY_DIR']
+      # store for future comparisons
+      adder_cache0 = adder_cache
+    }
+    update_to_version_1 = -> {
+      prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-adder@1.0.0")'
+      assert_success prj.configure
 
-    # store for future comparisons
-    @adder_cache0 = adder_cache
-  end
+      cache = prj.read_cache
+      assert_equal 1, cache.packages.size
 
-  def update_to_version_1
-    @prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-adder@1.0.0")'
-    assert_success @prj.configure
+      adder_cache = cache.packages[ADDER_PACKAGE_NAME]
+      assert_not_nil adder_cache
+      assert_equal '1.0.0', adder_cache.ver
 
-    cache = @prj.read_cache
-    assert_equal 1, cache.packages.size
+      # dirs shouldn't have changed
+      assert_equal adder_cache0.src_dir, adder_cache.src_dir
+      assert_equal adder_cache0.bin_dir, adder_cache.bin_dir
 
-    adder_cache = cache.packages[ADDER_PACKAGE_NAME]
-    assert_not_nil adder_cache
-    assert_equal '1.0.0', adder_cache.ver
+      assert_equal '1.0.0', File.read(adder_ver_file).strip
+    }
+    update_with_option_off_and_build = -> {
+      prj.create_lists_with package: <<~PACK
+        CPMAddPackage(
+          NAME testpack-adder
+          GITHUB_REPOSITORY cpm-cmake/testpack-adder
+          VERSION 1.0.0
+          OPTIONS "ADDER_BUILD_TESTS OFF"
+        )
+      PACK
+      assert_success prj.configure
+      assert_success prj.build
 
-    # dirs shouldn't have changed
-    assert_equal @adder_cache0.src_dir, adder_cache.src_dir
-    assert_equal @adder_cache0.bin_dir, adder_cache.bin_dir
+      exe_dir = File.join(prj.bin_dir, 'bin')
+      assert File.directory? exe_dir
 
-    assert_equal '1.0.0', File.read(@adder_ver_file).strip
-  end
+      exes = Dir[exe_dir + '/**/*'].filter {
+        # on multi-configuration generators (like Visual Studio) the executables will be in bin/<Config>
+        # also filter-out other articacts like .pdb or .dsym
+        !File.directory?(_1) && File.stat(_1).executable?
+      }.map {
+        # remove .exe extension if any (there will be one on Windows)
+        File.basename(_1, '.exe')
+      }.sort
 
-  def update_with_option_off_and_build
-    @prj.create_lists_with package: <<~PACK
-      CPMAddPackage(
-        NAME testpack-adder
-        GITHUB_REPOSITORY cpm-cmake/testpack-adder
-        VERSION 1.0.0
-        OPTIONS "ADDER_BUILD_TESTS OFF"
-      )
-    PACK
-    assert_success @prj.configure
-    assert_success @prj.build
+      # we should end up with two executables
+      # * simple - the simple example from adder
+      # * using-adder - for this project
+      # ...and notably no test for adder, which must be disabled from the option override from above
+      assert_equal ['simple', 'using-adder'], exes
+    }
 
-    exe_dir = File.join(@prj.bin_dir, 'bin')
-    assert File.directory? exe_dir
-
-    exes = Dir[exe_dir + '/**/*'].filter {
-      # on multi-configuration generators (like Visual Studio) the executables will be in bin/<Config>
-      # also filter-out other articacts like .pdb or .dsym
-      !File.directory?(_1) && File.stat(_1).executable?
-    }.map {
-      # remove .exe extension if any (there will be one on Windows)
-      File.basename(_1, '.exe')
-    }.sort
-
-    # we should end up with two executables
-    # * simple - the simple example from adder
-    # * using-adder - for this project
-    # ...and notably no test for adder, which must be disabled from the option override from above
-    assert_equal ['simple', 'using-adder'], exes
+    create_with_commit_sha.()
+    update_to_version_1.()
+    update_with_option_off_and_build.()
   end
 end
diff --git a/test/integration/test_source_cache.rb b/test/integration/test_source_cache.rb
index a6da52a..2db9dd0 100644
--- a/test/integration/test_source_cache.rb
+++ b/test/integration/test_source_cache.rb
@@ -10,34 +10,14 @@ class SourceCache < IntegrationTest
   end
 
   def test_add_remove_dependency
-    @prj = make_project 'using-fibadder'
+    prj = make_project 'using-fibadder'
 
-    create_with_fibadder
-  end
+    ###################################
+    # create
+    prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.0.0")'
+    assert_success prj.configure
 
-  def test_second_project
-    # @prj = make_project 'using-fibadder'
-
-    # create_with_newer_fibadder
-  end
-
-  def dir_subdirs(dir)
-    Dir["#{dir}/*/"]
-  end
-
-  def check_package_cache(name, ver, dir_sha1)
-    package = @cache.packages[name]
-    assert_not_nil package, name
-    assert_equal ver, package.ver
-    assert package.src_dir.start_with?(@cache_dir), "#{package.src_dir} must be in #{@cache_dir}"
-    assert_equal dir_sha1, File.basename(package.src_dir)
-  end
-
-  def create_with_fibadder
-    @prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.0.0")'
-    assert_success @prj.configure
-
-    @cache = @prj.read_cache
+    @cache = prj.read_cache
 
     # fibadder - adder
     #          \ fibonacci - Format
@@ -47,21 +27,55 @@ class SourceCache < IntegrationTest
     check_package_cache 'testpack-adder', '1.0.0', '1a4c153849d8e0cf9a3a245e5f6ab6e4722d8995'
     check_package_cache 'testpack-fibonacci', '2.0', '332c789cb09b8c2f92342dfb874c82bec643daf6'
     check_package_cache 'Format.cmake', '1.0', 'c5897bd28c5032d45f7f669c8fb470790d2ae156'
+
+    ###################################
+    # add one package with a newer version
+    prj.create_lists_with packages: [
+      'CPMAddPackage("gh:cpm-cmake/testpack-adder@1.0.1")',
+      'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.0.0")',
+    ]
+    assert_success prj.configure
+
+    @cache = prj.read_cache
+    assert_equal 4, @cache.packages.size
+
+    check_package_cache 'testpack-fibadder', '1.0.0', '6a17d24c95c44a169ff8ba173f52876a2ba3d137'
+    check_package_cache 'testpack-adder', '1.0.1', '84eb33c1b8db880083cefc2adf4dc3f04778cd44'
+    check_package_cache 'testpack-fibonacci', '2.0', '332c789cb09b8c2f92342dfb874c82bec643daf6'
+    check_package_cache 'Format.cmake', '1.0', 'c5897bd28c5032d45f7f669c8fb470790d2ae156'
   end
 
-  def create_with_newer_fibadder
-    @prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.1.0")'
-    assert_success @prj.configure
+  def test_second_project
+    prj = make_project 'using-fibadder'
+    prj.create_lists_with package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.1.0")'
+    assert_success prj.configure
 
-    @cache = @prj.read_cache
+    @cache = prj.read_cache
 
     # fibadder - adder
     #          \ fibonacci - Format
     assert_equal 4, @cache.packages.size
 
-    check_package_cache 'testpack-fibadder', '1.1.0', '6a17d24c95c44a169ff8ba173f52876a2ba3d137'
-    check_package_cache 'testpack-adder', '1.0.1', '1a4c153849d8e0cf9a3a245e5f6ab6e4722d8995'
+    check_package_cache 'testpack-fibadder', '1.1.0', '603d79d88d7230cc749460a0f476df862aa70ead'
+    check_package_cache 'testpack-adder', '1.0.1', '84eb33c1b8db880083cefc2adf4dc3f04778cd44'
     check_package_cache 'testpack-fibonacci', '2.0', '332c789cb09b8c2f92342dfb874c82bec643daf6'
     check_package_cache 'Format.cmake', '1.0', 'c5897bd28c5032d45f7f669c8fb470790d2ae156'
   end
+
+  def test_cache_dir_contents
+    num_subdirs = -> (name) { Dir["#{File.join(@cache_dir, name.downcase)}/*/"].size }
+    assert_equal 2, num_subdirs.('testpack-fibadder')
+    assert_equal 2, num_subdirs.('testpack-adder')
+    assert_equal 1, num_subdirs.('testpack-fibonacci')
+    assert_equal 1, num_subdirs.('Format.cmake')
+  end
+
+  def check_package_cache(name, ver, dir_sha1)
+    package = @cache.packages[name]
+    assert_not_nil package, name
+    assert_equal ver, package.ver
+    expected_parent_dir = File.join(@cache_dir, name.downcase)
+    assert package.src_dir.start_with?(expected_parent_dir), "#{package.src_dir} must be in #{expected_parent_dir}"
+    assert_equal dir_sha1, File.basename(package.src_dir)
+  end
 end