diff --git a/Cargo.lock b/Cargo.lock
index a0ab2f67..18b3e897 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -13,52 +13,68 @@ dependencies = [
 
 [[package]]
 name = "anstream"
-version = "0.6.13"
+version = "0.6.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d96bd03f33fe50a863e394ee9718a706f988b9079b20c3784fb726e7678b62fb"
+checksum = "418c75fa768af9c03be99d17643f93f79bbba589895012a80e3452a19ddda15b"
 dependencies = [
  "anstyle",
  "anstyle-parse",
  "anstyle-query",
  "anstyle-wincon",
  "colorchoice",
+ "is_terminal_polyfill",
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle"
-version = "1.0.6"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8901269c6307e8d93993578286ac0edf7f195079ffff5ebdeea6a59ffb7e36bc"
+checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c75ac65da39e5fe5ab759307499ddad880d724eed2f6ce5b5e8a26f4f387928c"
+checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle-query"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e28923312444cdd728e4738b3f9c9cac739500909bb3d3c94b43551b16517648"
+checksum = "a64c907d4e79225ac72e2a354c9ce84d50ebb4586dee56c82b3ee73004f537f5"
 dependencies = [
  "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.2"
+version = "3.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cd54b81ec8d6180e24654d0b371ad22fc3dd083b6ff8ba325b72e00c87660a7"
+checksum = "61a38449feb7068f52bb06c12759005cf459ee52bb4adc1d5a7c4322d716fb19"
 dependencies = [
  "anstyle",
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "assert_cmd"
+version = "2.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed72493ac66d5804837f480ab3766c72bdfab91a65e565fc54fa9e42db0073a8"
+dependencies = [
+ "anstyle",
+ "bstr",
+ "doc-comment",
+ "predicates",
+ "predicates-core",
+ "predicates-tree",
+ "wait-timeout",
+]
+
 [[package]]
 name = "assert_matches"
 version = "1.5.0"
@@ -67,9 +83,9 @@ checksum = "9b34d609dfbaf33d6889b2b7106d3ca345eacad44200913df5ba02bfd31d2ba9"
 
 [[package]]
 name = "autocfg"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
+checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
 [[package]]
 name = "bitflags"
@@ -93,6 +109,17 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "bstr"
+version = "1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05efc5cfd9110c8416e471df0e96702d58690178e206e61b7173706673c93706"
+dependencies = [
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -141,15 +168,15 @@ checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
 
 [[package]]
 name = "colorchoice"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
+checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.12"
+version = "0.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab3db02a9c5b5121e1e42fbdb1aeb65f5e02624cc58c43f2884c6ccac0b82f95"
+checksum = "33480d6946193aa8033910124896ca395333cae7e2d1113d1fef6c3272217df2"
 dependencies = [
  "crossbeam-utils",
 ]
@@ -175,15 +202,15 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.19"
+version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
+checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
 [[package]]
 name = "dactyl"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94055d86faa2715e63740352efcb018b05fb758a9657d0fc73eaf499d2d62321"
+checksum = "5cf28ee1e8e5bb53ebea93776d80b71465d6c670a7221672557974e7935784e8"
 
 [[package]]
 name = "diff"
@@ -191,6 +218,12 @@ version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
 
+[[package]]
+name = "difflib"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6184e33543162437515c2e2b48714794e37845ec9851711914eec9d308f6ebe8"
+
 [[package]]
 name = "dirs"
 version = "5.0.1"
@@ -212,6 +245,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "doc-comment"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
+
 [[package]]
 name = "dunce"
 version = "1.0.4"
@@ -220,9 +259,9 @@ checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
 
 [[package]]
 name = "either"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a47c1c47d2f5964e29c61246e81db715514cd532db6b5116a25ea3c03d6780a2"
+checksum = "3dca9240753cf90908d7e4aac30f630662b02aebaa1b58a3cadabdb23385b58b"
 
 [[package]]
 name = "enum-map"
@@ -275,9 +314,9 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
 [[package]]
 name = "errno"
-version = "0.3.8"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
+checksum = "534c5cf6194dfab3db3242765c03bbe257cf92f22b38f6bc0c58d59108a820ba"
 dependencies = [
  "libc",
  "windows-sys 0.52.0",
@@ -285,9 +324,18 @@ dependencies = [
 
 [[package]]
 name = "fastrand"
-version = "2.0.2"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
+
+[[package]]
+name = "float-cmp"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "658bd65b1cf4c852a3cc96f18a8ce7b5640f6b703f905c7d74532294c2a63984"
+checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
+dependencies = [
+ "num-traits",
+]
 
 [[package]]
 name = "fnv"
@@ -306,9 +354,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94b22e06ecb0110981051723910cbf0b5f5e09a2062dd7663334ee79a9d1286c"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
@@ -323,9 +371,9 @@ checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
 [[package]]
 name = "hashbrown"
-version = "0.14.3"
+version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
 
 [[package]]
 name = "heck"
@@ -365,11 +413,17 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8478577c03552c21db0e2724ffb8986a5ce7af88107e6be5d2ee6e158c12800"
+
 [[package]]
 name = "itertools"
-version = "0.12.1"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
 dependencies = [
  "either",
 ]
@@ -382,9 +436,9 @@ checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "libc"
-version = "0.2.153"
+version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
+checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libredox"
@@ -398,9 +452,9 @@ dependencies = [
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
+checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
 [[package]]
 name = "lock_api"
@@ -449,6 +503,21 @@ version = "2.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
 
+[[package]]
+name = "normalize-line-endings"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61807f77802ff30975e01f4f071c8ba10c022052f98b3294119f3e615d13e5be"
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "option-ext"
 version = "0.2.0"
@@ -466,9 +535,9 @@ dependencies = [
 
 [[package]]
 name = "parking_lot"
-version = "0.12.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e4af0ca4f6caed20e900d564c242b8e5d4903fdacf31d3daf527b66fe6f42fb"
+checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -499,6 +568,36 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "268ad82d92622fb0a049ff14b01089b0f1bcd5c507fab44724394d328417348a"
 
+[[package]]
+name = "predicates"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68b87bfd4605926cdfefc1c3b5f8fe560e3feca9d5552cf68c466d3d8236c7e8"
+dependencies = [
+ "anstyle",
+ "difflib",
+ "float-cmp",
+ "normalize-line-endings",
+ "predicates-core",
+ "regex",
+]
+
+[[package]]
+name = "predicates-core"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b794032607612e7abeb4db69adb4e33590fa6cf1149e95fd7cb00e634b92f174"
+
+[[package]]
+name = "predicates-tree"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "368ba315fb8c5052ab692e68a0eefec6ec57b23a36959c14496f0b0df2c0cecf"
+dependencies = [
+ "predicates-core",
+ "termtree",
+]
+
 [[package]]
 name = "pretty_assertions"
 version = "1.4.0"
@@ -511,9 +610,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.81"
+version = "1.0.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
+checksum = "ec96c6a92621310b51366f1e28d05ef11489516e93be030060e5fc12024a49d6"
 dependencies = [
  "unicode-ident",
 ]
@@ -611,15 +710,15 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.15"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80af6f9131f277a45a3fba6ce8e2258037bb0477a67e610d3c1fe046ab31de47"
+checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "ryu"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
 [[package]]
 name = "scopeguard"
@@ -629,18 +728,18 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "serde"
-version = "1.0.199"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c9f6e76df036c77cd94996771fb40db98187f096dd0b9af39c6c6e452ba966a"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.199"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11bd257a6541e141e42ca6d24ae26f7714887b47e89aa739099104c7e4d3b7fc"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -649,9 +748,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.116"
+version = "1.0.117"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e17db7126d17feb94eb3fad46bf1a96b034e8aacbc2e775fe81505f8b0b2813"
+checksum = "455182ea6142b14f93f4bc5320a2b31c1f266b66a4a5c858b013302a5d8cbfc3"
 dependencies = [
  "itoa",
  "ryu",
@@ -671,9 +770,9 @@ dependencies = [
 
 [[package]]
 name = "serde_spanned"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb3622f419d1296904700073ea6cc23ad690adbd66f13ea683df73298736f0c1"
+checksum = "79e674e01f999af37c49f70a6ede167a8a60b2503e56c5599532a65baa5969a0"
 dependencies = [
  "serde",
 ]
@@ -724,9 +823,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.60"
+version = "2.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -745,20 +844,26 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "termtree"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3369f5ac52d5eb6ab48c6b4ffdc8efbcad6b89c765749064ba298f2c68a16a76"
+
 [[package]]
 name = "thiserror"
-version = "1.0.59"
+version = "1.0.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0126ad08bff79f29fc3ae6a55cc72352056dfff61e3ff8bb7129476d44b23aa"
+checksum = "c546c80d6be4bc6a00c0f01730c08df82eaa7a7a61f11d656526506112cc1709"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.59"
+version = "1.0.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1cd413b5d558b4c5bf3680e324a6fa5014e7b7c067a51e69dbdf47eb7148b66"
+checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -782,9 +887,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "toml"
-version = "0.8.12"
+version = "0.8.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9dd1545e8208b4a5af1aa9bbd0b4cf7e9ea08fabc5d0a5c67fcaafa17433aa3"
+checksum = "a4e43f8cc456c9704c851ae29c67e17ef65d2c30017c17a9765b89c382dc8bba"
 dependencies = [
  "serde",
  "serde_spanned",
@@ -794,18 +899,18 @@ dependencies = [
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3550f4e9685620ac18a50ed434eb3aec30db8ba93b0287467bca5826ea25baf1"
+checksum = "4badfd56924ae69bcc9039335b2e017639ce3f9b001c393c1b2d1ef846ce2cbf"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "toml_edit"
-version = "0.22.12"
+version = "0.22.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3328d4f68a705b2a4498da1d580585d39a6510f98318a2cec3018a7ec61ddef"
+checksum = "c127785850e8c20836d49732ae6abfa47616e60bf9d9f57c43c250361a9db96c"
 dependencies = [
  "indexmap",
  "serde",
@@ -863,6 +968,7 @@ checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 name = "vhdl_lang"
 version = "0.80.0"
 dependencies = [
+ "assert_cmd",
  "assert_matches",
  "brunch",
  "clap",
@@ -875,6 +981,7 @@ dependencies = [
  "pad",
  "parking_lot",
  "pinned_vec",
+ "predicates",
  "pretty_assertions",
  "rayon",
  "strum",
@@ -909,6 +1016,15 @@ dependencies = [
  "vhdl_lang",
 ]
 
+[[package]]
+name = "wait-timeout"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
@@ -1056,9 +1172,9 @@ checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
 
 [[package]]
 name = "winnow"
-version = "0.6.7"
+version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14b9415ee827af173ebb3f15f9083df5a122eb93572ec28741fb153356ea2578"
+checksum = "c3c52e9c97a68071b23e836c9380edae937f17b9c4667bd021973efc689f618d"
 dependencies = [
  "memchr",
 ]
diff --git a/vhdl_lang/Cargo.toml b/vhdl_lang/Cargo.toml
index ecf97380..65036415 100644
--- a/vhdl_lang/Cargo.toml
+++ b/vhdl_lang/Cargo.toml
@@ -35,6 +35,8 @@ tempfile = "3"
 pretty_assertions = "1"
 assert_matches = "1"
 brunch = "0"
+assert_cmd = "2.0.14"
+predicates = "3.1.0"
 
 [[bench]]
 name = "benchmark"
diff --git a/vhdl_lang/src/config.rs b/vhdl_lang/src/config.rs
index 34819575..be0be812 100644
--- a/vhdl_lang/src/config.rs
+++ b/vhdl_lang/src/config.rs
@@ -253,7 +253,15 @@ impl Config {
     }
 
     /// Load configuration file from installation folder
-    fn load_installed_config(&mut self, messages: &mut dyn MessageHandler) {
+    fn load_installed_config(
+        &mut self,
+        messages: &mut dyn MessageHandler,
+        location: Option<String>,
+    ) {
+        if let Some(location) = location {
+            self.load_config(&PathBuf::from(location), "Installation", messages);
+            return;
+        }
         let search_paths = [
             "../vhdl_libraries",
             "../../vhdl_libraries",
@@ -325,8 +333,17 @@ impl Config {
     }
 
     /// Load all external configuration
-    pub fn load_external_config(&mut self, messages: &mut dyn MessageHandler) {
-        self.load_installed_config(messages);
+    /// If the `standard_libraries_path` is given, it must point to a valid
+    /// `vhdl_ls.toml` file, which will be used as source for the standard libraries
+    /// i.e., `std` or `ieee`.
+    /// If this path is `None`, a set of standard search paths will be queried for the location
+    /// of this file.
+    pub fn load_external_config(
+        &mut self,
+        messages: &mut dyn MessageHandler,
+        standard_libraries_path: Option<String>,
+    ) {
+        self.load_installed_config(messages, standard_libraries_path);
         self.load_home_config(messages);
         self.load_env_config("VHDL_LS_CONFIG", messages);
     }
diff --git a/vhdl_lang/src/main.rs b/vhdl_lang/src/main.rs
index 8d951e85..6364f3e6 100644
--- a/vhdl_lang/src/main.rs
+++ b/vhdl_lang/src/main.rs
@@ -5,43 +5,26 @@
 // Copyright (c) 2018, Olof Kraigher olof.kraigher@gmail.com
 
 use clap::Parser;
+use itertools::Itertools;
 use std::path::Path;
-use std::time::SystemTime;
-use vhdl_lang::{Config, Diagnostic, MessagePrinter, NullMessages, Project, Severity, SeverityMap};
+use vhdl_lang::{Config, Diagnostic, MessagePrinter, Project, Severity, SeverityMap};
 
 /// Run vhdl analysis
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
 struct Args {
-    /// The number of threads to use. By default the maximum is selected based on process cores
+    /// The number of threads to use. By default, the maximum is selected based on process cores
     #[arg(short = 'p', long)]
     num_threads: Option<usize>,
 
-    /// Prints the number of files processed and the execution time
-    #[arg(long, default_value_t = false)]
-    perf: bool,
-
-    /// Run repeatedly to get a reliable benchmark result
-    #[arg(long, default_value_t = false)]
-    bench: bool,
-
-    /// Hide hint diagnostics
-    #[arg(long, default_value_t = false)]
-    no_hint: bool,
+    /// Path to the config file for the VHDL standard libraries (i.e., IEEE std_logic_1164).
+    /// If omitted, will search for these libraries in a set of standard paths
+    #[arg(short = 'l', long)]
+    libraries: Option<String>,
 
     /// Config file in TOML format containing libraries and settings
     #[arg(short, long)]
     config: String,
-
-    /// Dump items that are not resolved into an unique reference
-    /// This is used for development to test where the language server is blind
-    #[arg(long)]
-    dump_unresolved: bool,
-
-    /// Count items that are not resolved into an unique reference
-    /// This is used for development to test where the language server is blind
-    #[arg(long)]
-    count_unresolved: bool,
 }
 
 fn main() {
@@ -53,77 +36,36 @@ fn main() {
 
     let mut config = Config::default();
     let mut msg_printer = MessagePrinter::default();
-    config.load_external_config(&mut msg_printer);
+    config.load_external_config(&mut msg_printer, args.libraries.clone());
     config.append(
         &Config::read_file_path(Path::new(&args.config)).expect("Failed to read config file"),
         &mut msg_printer,
     );
 
-    let start = SystemTime::now();
-
-    let iterations = if args.bench {
-        let iterations = 10;
-        println!("Running {iterations} iterations for benchmarking");
-        for _ in 0..(iterations - 1) {
-            let mut project = Project::from_config(config.clone(), &mut NullMessages);
-            project.analyse();
-        }
-        iterations
-    } else {
-        1
-    };
-
     let severity_map = *config.severities();
     let mut project = Project::from_config(config, &mut msg_printer);
-    let mut diagnostics = project.analyse();
-    let duration = start.elapsed().unwrap() / iterations;
-
-    if args.no_hint {
-        diagnostics.retain(|diag| severity_map[diag.code] != Some(Severity::Hint));
-    }
+    project.enable_unused_declaration_detection();
+    let diagnostics = project.analyse();
 
     show_diagnostics(&diagnostics, &severity_map);
 
-    if args.perf || args.bench {
-        let mut num_files = 0;
-        let mut num_lines = 0;
-        for source_file in project.files() {
-            num_files += 1;
-            num_lines += source_file.num_lines();
-        }
-        let duration_per_line = duration.checked_div(num_lines as u32).unwrap();
-
-        println!("Analyzed {num_files} files with {num_lines} lines of code");
-        println!(
-            "Total time to run was {} ms with an average of {} ns per line",
-            duration.as_millis(),
-            duration_per_line.as_nanos()
-        );
-    }
-
-    if args.dump_unresolved || args.count_unresolved {
-        let (total, unresolved) = project.find_all_unresolved();
-
-        if args.dump_unresolved {
-            for pos in unresolved.iter() {
-                println!("{}", pos.show("Unresolved"));
-            }
-        }
-
-        if args.count_unresolved {
-            println!("{} out of {} positions unresolved", unresolved.len(), total);
-        }
+    if diagnostics
+        .iter()
+        .any(|diag| severity_map[diag.code].is_some_and(|severity| severity == Severity::Error))
+    {
+        std::process::exit(1);
+    } else {
+        std::process::exit(0);
     }
-
-    // Exit without running Drop on entire allocated AST
-    std::process::exit(0);
 }
 
 fn show_diagnostics(diagnostics: &[Diagnostic], severity_map: &SeverityMap) {
-    for diagnostic in diagnostics {
-        if let Some(str) = diagnostic.show(severity_map) {
-            println!("{str}");
-        }
+    let diagnostics = diagnostics
+        .iter()
+        .filter_map(|diag| diag.show(severity_map))
+        .collect_vec();
+    for str in &diagnostics {
+        println!("{str}");
     }
 
     if !diagnostics.is_empty() {
diff --git a/vhdl_lang/tests/integration_tests.rs b/vhdl_lang/tests/integration_tests.rs
new file mode 100644
index 00000000..9d6b0d05
--- /dev/null
+++ b/vhdl_lang/tests/integration_tests.rs
@@ -0,0 +1,60 @@
+use assert_cmd::prelude::*;
+use itertools::Itertools;
+use predicates::prelude::*;
+use std::error::Error;
+use std::path::PathBuf;
+use std::process::Command;
+use vhdl_lang::{Config, MessagePrinter, Project, Severity};
+
+#[test]
+pub fn parses_example_project_without_errors() {
+    let mut config = Config::default();
+    let mut msg_printer = MessagePrinter::default();
+
+    let mut vhdl_libraries_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    // Load the VHDL standard libraries
+    vhdl_libraries_path.push("../vhdl_libraries/vhdl_ls.toml");
+    config.append(
+        &Config::read_file_path(&vhdl_libraries_path).expect("Failed to read config file"),
+        &mut msg_printer,
+    );
+
+    // Load the configuration from the example project
+    let mut config_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    config_path.push("../example_project/vhdl_ls.toml");
+    config.append(
+        &Config::read_file_path(&config_path).expect("Failed to read config file"),
+        &mut msg_printer,
+    );
+
+    let severity_map = *config.severities();
+    let mut project = Project::from_config(config, &mut msg_printer);
+    project.enable_unused_declaration_detection();
+
+    let diagnostics = project.analyse();
+    let diagnostics_with_errors = diagnostics
+        .iter()
+        .filter(|diag| severity_map[diag.code] == Some(Severity::Error))
+        .collect_vec();
+    if !diagnostics_with_errors.is_empty() {
+        for diagnostic in diagnostics_with_errors {
+            println!("{}", diagnostic.show(&severity_map).unwrap())
+        }
+        panic!("Found diagnostics with severity error in the example project");
+    }
+}
+
+#[test]
+fn unused_function_gets_detected() -> Result<(), Box<dyn Error>> {
+    let mut cmd = Command::cargo_bin("vhdl_lang")?;
+
+    cmd.arg("--config")
+        .arg("tests/unused_declarations/vhdl_ls.toml")
+        .arg("--libraries")
+        .arg("../vhdl_libraries/vhdl_ls.toml");
+    cmd.assert().failure().stdout(predicate::str::contains(
+        "error: Unused declaration of port 'baz' : inout",
+    ));
+
+    Ok(())
+}
diff --git a/vhdl_lang/tests/unused_declarations/my_entity.vhd b/vhdl_lang/tests/unused_declarations/my_entity.vhd
new file mode 100644
index 00000000..905393f1
--- /dev/null
+++ b/vhdl_lang/tests/unused_declarations/my_entity.vhd
@@ -0,0 +1,15 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity my_ent is
+    port (
+        foo : in std_logic;
+        bar : out std_logic;
+        baz : inout std_logic
+    );
+end my_ent;
+
+architecture arch of my_ent is
+begin
+    bar <= foo;
+end architecture arch;
diff --git a/vhdl_lang/tests/unused_declarations/vhdl_ls.toml b/vhdl_lang/tests/unused_declarations/vhdl_ls.toml
new file mode 100644
index 00000000..907633f6
--- /dev/null
+++ b/vhdl_lang/tests/unused_declarations/vhdl_ls.toml
@@ -0,0 +1,6 @@
+[libraries]
+
+my_library.files = ["my_entity.vhd"]
+
+[lint]
+unused = "error"
diff --git a/vhdl_ls/src/vhdl_server.rs b/vhdl_ls/src/vhdl_server.rs
index ee999667..38877cf8 100644
--- a/vhdl_ls/src/vhdl_server.rs
+++ b/vhdl_ls/src/vhdl_server.rs
@@ -116,7 +116,7 @@ impl VHDLServer {
         let mut config = Config::default();
 
         if self.use_external_config {
-            config.load_external_config(&mut self.message_filter());
+            config.load_external_config(&mut self.message_filter(), None);
         }
 
         match self.load_root_uri_config() {