diff --git a/gnu/packages/admin.scm b/gnu/packages/admin.scm
index 0b21d34a6a..a8d4269fbb 100644
--- a/gnu/packages/admin.scm
+++ b/gnu/packages/admin.scm
@@ -5395,8 +5395,7 @@ (define-public greetd
                (base32 "1b79lb0vikh5vwpdlyga6zwzm11gpsd7ghp8zb0q2m6mlqlj5by3"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-nix" ,rust-nix-0.26)
         ("rust-pam-sys" ,rust-pam-sys-0.5)
         ("rust-rpassword" ,rust-rpassword-5)
@@ -5501,8 +5500,7 @@ (define-public wlgreet
                "1k0jmgh0rjbnb49gkvs0a4d7z9xb6pad8v5w5f7my4s0rfpk7wd9"))))
     (build-system cargo-build-system)
     (arguments
-     (list #:tests? #~(not (%current-target-system))
-           #:cargo-inputs
+     (list #:cargo-inputs
            `(("rust-chrono" ,rust-chrono-0.4)
              ("rust-getopts" ,rust-getopts-0.2)
              ("rust-greetd-ipc" ,rust-greetd-ipc-0.9)
@@ -5921,7 +5919,6 @@ (define-public du-dust
      `(#:cargo-test-flags
        (list "--release" "--"
              "--skip=test_apparent_size")
-       #:tests? ,(not (%current-target-system))
        #:install-source? #f
        #:cargo-inputs (("rust-ansi-term" ,rust-ansi-term-0.12)
                        ("rust-atty" ,rust-atty-0.2)
diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 804693427d..ea0fe17b21 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -2654,7 +2654,6 @@ (define-public circtools
                (("find_package\\(biosoup 0.10.0 QUIET\\)")
                 "find_package(biosoup 0.10.0 CONFIG)")
                (("GTest_FOUND") "TRUE")))))
-       #:tests? ,(not (%current-target-system))
        #:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-bio" ,rust-bio-0.33)
@@ -21094,7 +21093,6 @@ (define-public python-gseapy
     (build-system cargo-build-system)
     (arguments
      (list
-      #:tests? #~(not (%current-target-system))
       #:install-source? #false
       #:features '(list "extension-module")
       #:cargo-test-flags '(list "--features=extension-module")
diff --git a/gnu/packages/crypto.scm b/gnu/packages/crypto.scm
index d4eb667286..c7145bcb0c 100644
--- a/gnu/packages/crypto.scm
+++ b/gnu/packages/crypto.scm
@@ -268,8 +268,7 @@ (define-public rust-minisign
          (base32 "1lmp83bxdg53c4n35fbwr3rkh6178y75fwsn25hf1kn62f2gbdnj"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-getrandom" ,rust-getrandom-0.2)
         ("rust-rpassword" ,rust-rpassword-7)
         ("rust-scrypt" ,rust-scrypt-0.11))))
@@ -1606,8 +1605,7 @@ (define-public b3sum
          (base32 "05k0vn7gpbvjr925vjc5yzvhiyrmkw9pqmch5fr4ir7s8wiaq2fm"))))
     (build-system cargo-build-system)
     (arguments
-      `(#:tests? ,(not (%current-target-system))
-        ;; Install the source so that Cargo.toml is installed, because that is
+      `(;; Install the source so that Cargo.toml is installed, because that is
         ;; the only reference to the license information.
         #:install-source? #t
         #:phases
diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index 5fcc9409ef..865ff3b9d7 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -3513,7 +3513,6 @@ (define-public librsvg
     (outputs '("out" "doc" "debug"))
     (arguments
      (list
-      #:tests? #~(not (%current-target-system))
       #:install-source? #f
       #:modules
       '((guix build cargo-build-system)
diff --git a/gnu/packages/python-crypto.scm b/gnu/packages/python-crypto.scm
index f7f8a60d23..b787d6207f 100644
--- a/gnu/packages/python-crypto.scm
+++ b/gnu/packages/python-crypto.scm
@@ -362,7 +362,6 @@ (define-public python-blake3
     (build-system cargo-build-system)
     (arguments
      (list
-      #:tests? #~(not (%current-target-system))
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'install 'build-python-module
@@ -569,7 +568,6 @@ (define-public python-cryptography-rust
                   (guix build utils)
                   (srfi srfi-1)
                   (ice-9 match))
-      #:tests? #~(not (%current-target-system))
       #:install-source? #f
       ;; As seen in noxfile.py
       #:cargo-test-flags ''("--release" "--no-default-features")
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index fcce6ca425..34cfc07307 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -3053,7 +3053,6 @@ (define-public python-orjson
             (assoc-ref py:%standard-phases 'build))
           (add-after 'build-python-module 'install-python-module
             (assoc-ref py:%standard-phases 'install)))
-      #:tests? #~(not (%current-target-system))
       #:cargo-inputs
       `(("rust-ahash" ,rust-ahash-0.8)
         ("rust-arrayvec" ,rust-arrayvec-0.7)
diff --git a/gnu/packages/rust-apps.scm b/gnu/packages/rust-apps.scm
index c98bd86ada..d1a5da66d9 100644
--- a/gnu/packages/rust-apps.scm
+++ b/gnu/packages/rust-apps.scm
@@ -99,8 +99,7 @@ (define-public agate
         (base32 "1mhrl4j5r6wzsnwpqsbgzny5vqschyjm3gnk4y88har7skk7j19v"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-configparser" ,rust-configparser-2)
         ("rust-env-logger" ,rust-env-logger-0.8)
         ("rust-getopts" ,rust-getopts-0.2)
@@ -139,8 +138,7 @@ (define-public alfis
         (base32 "1kgzz92mkyzn7mbsdpik1q21kl38i4almn01k99nww3p0vgx9514"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-test-flags
+     `(#:cargo-test-flags
        '("--release" "--"
          "--skip=dns::client::tests::test_tcp_client"
          "--skip=dns::client::tests::test_udp_client")
@@ -213,8 +211,7 @@ (define-public bat
         (base32 "05sj0chxpai26fhk1k7p5m54v3j7n1x64ayx53mcimsj1skdr77m"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-colours" ,rust-ansi-colours-1)
         ("rust-ansi-term" ,rust-ansi-term-0.12)
         ("rust-atty" ,rust-atty-0.2)
@@ -276,8 +273,7 @@ (define-public diffr
           (base32 "1b0mz1ki2ksxni6g49x5l5j9ijpyhc11mywvxr9i9h3nr098nc5l"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        ;; https://github.com/mookid/diffr/issues/79
        #:cargo-test-flags
        '("--release" "--"
@@ -317,8 +313,7 @@ (define-public drill
           (base32 "1m73d7rzi0p5c1hn0081d2235kcyapdza7h0vqf5jhnirpnjn793"))))
     (build-system cargo-build-system)
     (arguments
-      `(#:tests? ,(not (%current-target-system))
-        #:cargo-inputs
+      `(#:cargo-inputs
         (("rust-async-trait" ,rust-async-trait-0.1)
          ("rust-clap" ,rust-clap-2)
          ("rust-colored" ,rust-colored-1)
@@ -359,8 +354,7 @@ (define-public dutree
          (base32 "1611h27i8fm3jndscd6w65z8z7w09nnrm61vdgs9kb8ln57gqm8x"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        #:cargo-inputs
        (("rust-getopts" ,rust-getopts-0.2)
         ("rust-regex" ,rust-regex-1)
@@ -398,8 +392,7 @@ (define-public exa
          "1dd7waq2bnxc1xwygqphi8k1g2qzykr6fk0q4rgrhhxp2jd09f04"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        #:cargo-inputs
        (("rust-ansi-term" ,rust-ansi-term-0.12)
         ("rust-datetime" ,rust-datetime-0.5)
@@ -485,8 +478,7 @@ (define-public fd
          "186217yyb0znfn4jcc9l3i51fhfyb23lhbm3gg084sdrbj6bdnbg"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-test-flags
+     `(#:cargo-test-flags
        '("--release"
          "--"
          ;; No user 'root' in the build environment.
@@ -577,8 +569,7 @@ (define-public hexyl
           "0sipag77196467idbznbk5q5lwhqz85zw7y1pwg9b27jxqyk04rp"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-term" ,rust-ansi-term-0.12)
         ("rust-atty" ,rust-atty-0.2)
         ("rust-clap" ,rust-clap-2)
@@ -609,7 +600,6 @@ (define-public hyperfine
      `(#:modules ((guix build cargo-build-system)
                   (guix build utils)
                   (srfi srfi-26))
-       #:tests? ,(not (%current-target-system))
        #:cargo-inputs
        (("rust-atty" ,rust-atty-0.2)
         ("rust-cfg-if" ,rust-cfg-if-0.1)
@@ -669,7 +659,6 @@ (define-public i3status-rust
     (build-system cargo-build-system)
     (arguments
      `(#:features '("pulseaudio" "libpulse-binding")
-       #:tests? ,(not (%current-target-system))
        #:install-source? #f
        #:cargo-inputs
        (("rust-chrono" ,rust-chrono-0.4)
@@ -762,8 +751,7 @@ (define-public just
                (base32 "0kafd87zmjf7wswyiqakqd2r5b8q3a761ipsihmrg9wr57k5zlis"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-test-flags
+     `(#:cargo-test-flags
        '("--release" "--"
          "--skip=functions::env_var_functions"
          "--skip=string::shebang_backtick")
@@ -867,7 +855,6 @@ (define-public maturin
        #:imported-modules ((guix build cargo-build-system)
                            (guix build cargo-utils)
                            ,@%pyproject-build-system-modules)
-       #:tests? ,(not (%current-target-system))
        #:install-source? #f
        #:cargo-test-flags
        '("--release" "--"
@@ -1025,8 +1012,7 @@ (define-public ripgrep
          "1gv4imhjgxmyxaa996yshcjlakmrjw9pf4rycp90pq675cn9sz7k"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-bstr" ,rust-bstr-0.2)
         ("rust-clap" ,rust-clap-2)
         ("rust-grep" ,rust-grep-0.2)
@@ -1083,8 +1069,7 @@ (define-public rot8
                 "1m5kzpqq9pgc19lbnh20iaq654lzlmc1m5fc9f73w2vpwqdiw1qf"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs (("rust-clap" ,rust-clap-2)
+     `(#:cargo-inputs (("rust-clap" ,rust-clap-2)
                        ("rust-glob" ,rust-glob-0.3)
                        ("rust-regex" ,rust-regex-1)
                        ("rust-serde" ,rust-serde-1)
@@ -1117,8 +1102,7 @@ (define-public rust-swc
                    (string-append "\"^" version)))))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        #:cargo-build-flags
        '("--release" "-p" "swc_cli")
        #:cargo-test-flags
@@ -1253,8 +1237,7 @@ (define-public rust-cargo-edit
                 "19wfjz7z4kqjfjmnq1bl6dhsvskjy6r656fqmbha9dfdspbsnmd0"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        ;; error[E0463]: can't find crate for `cargo_test_macro`
        #:tests? #f
        #:cargo-inputs
@@ -1327,8 +1310,7 @@ (define-public git-interactive-rebase-tool
          "173spqqpyc00kvfmldjmjfqizh9b4spq4xw4bskd4dny8qcpz28d"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-test-flags
+     `(#:cargo-test-flags
        ;; https://github.com/MitMaro/git-interactive-rebase-tool/issues/586
        '("--release" "--" "--skip=tests::success")
        #:cargo-inputs
@@ -1372,8 +1354,7 @@ (define-public rust-cbindgen
           "0673pq96hs7waavkv58v2pakpxpsfyjvbraa5kyl2b44phgdzcid"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("clap" ,rust-clap-2)
         ("log" ,rust-log-0.4)
         ("proc-macro2" ,rust-proc-macro2-1)
@@ -1402,8 +1383,7 @@ (define-public rust-cbindgen-0.24
               (base32
                "1yqxqsz2d0cppd8zwihk2139g5gy38wqgl9snj6rnk8gyvnqsdd6"))))
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-clap" ,rust-clap-3)
         ("rust-heck" ,rust-heck-0.4)
         ("rust-indexmap" ,rust-indexmap-1)
@@ -1448,8 +1428,7 @@ (define-public rust-cbindgen-0.19
         (base32
          "1yld9fni9g9mzg4r42zfk79aq9mzm2sfzzjrrx4vir4lp4qqqwiq"))))
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-clap" ,rust-clap-2)
         ("rust-heck" ,rust-heck-0.3)
         ("rust-indexmap" ,rust-indexmap-1)
@@ -1510,8 +1489,7 @@ (define-public sniffglue
          "038wcjiiay825wc8inmn62flklc1adxskg5fmjhmxqnhwmj1k5gn"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-term" ,rust-ansi-term-0.12)
         ("rust-anyhow" ,rust-anyhow-1)
         ("rust-atty" ,rust-atty-0.2)
@@ -1565,8 +1543,7 @@ (define-public tectonic
         (base32 "1q4mz2c32gfypx33zlzgd1q9h4322jrk13fzvsf8h676ylclqzpc"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-build-flags '("--release" "--features" "external-harfbuzz")
+     `(#:cargo-build-flags '("--release" "--features" "external-harfbuzz")
        #:cargo-inputs
        (("rust-atty" ,rust-atty-0.2)
         ("rust-byte-unit" ,rust-byte-unit-4)
@@ -1648,8 +1625,7 @@ (define-public treefmt
         (base32 "1rarg6rffzl1cf6r167h9p14wr696kwnzr85kwbdy7x7x5zpj5li"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        #:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-console" ,rust-console-0.13)
@@ -1707,8 +1683,7 @@ (define-public hex
         (base32 "03x27nixdlnkkrh85gy4152arp02kpjwq0i9dn9p73lyr24s64lv"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-term" ,rust-ansi-term-0.12)
         ("rust-atty" ,rust-atty-0.2)
         ("rust-clap" ,rust-clap-2)
@@ -1735,8 +1710,7 @@ (define-public tokei
         (base32 "000w549v1bpw7r57xw656p40ywf1gimvxxx5cjnri2js0xg927x4"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-aho-corasick" ,rust-aho-corasick-0.7)
         ("rust-clap" ,rust-clap-2)
         ("rust-crossbeam-channel" ,rust-crossbeam-channel-0.5)
@@ -1789,8 +1763,7 @@ (define-public vivid
         (base32 "01fds6dm19bqgqydaa6n051v9l4wh9rb5d6sr9akwp2cc0fs43b7"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-colours" ,rust-ansi-colours-1)
         ("rust-clap" ,rust-clap-2)
         ("rust-dirs" ,rust-dirs-3)
@@ -1838,7 +1811,6 @@ (define-public watchexec
                ;;
                ;; (copy-file "completions/zsh" zsh)
                (install-file "README.md" doc)))))
-       #:tests? ,(not (%current-target-system))
        #:cargo-inputs
        (("rust-clap" ,rust-clap-2)
         ("rust-embed-resource" ,rust-embed-resource-1)
@@ -1881,7 +1853,6 @@ (define-public rbw
              (substitute*
                  "Cargo.toml"
                (("version = \"1.4\"") "version = \"^1\"")))))
-       #:tests? ,(not (%current-target-system))
        #:cargo-inputs
        (("rust-aes" ,rust-aes-0.7)
         ("rust-anyhow" ,rust-anyhow-1)
@@ -1954,7 +1925,6 @@ (define-public rust-analyzer
     (build-system cargo-build-system)
     (arguments
      `(#:rust ,rust-1.64
-       #:tests? ,(not (%current-target-system))
        #:install-source? #f             ; virtual manifest
        #:cargo-test-flags
        '("--release" "--lib" "--tests" "--"
@@ -2131,8 +2101,7 @@ (define-public rust-cargo-c
           "191d0813g4m2g1c1h8ykgrfp00blkbds6pg3zl044iyxaclng29h"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-cargo" ,rust-cargo-0.69)
         ("rust-cargo-util" ,rust-cargo-util-0.2)
@@ -2173,8 +2142,7 @@ (define-public rtss
         (base32 "1r1b6fynkjnpj5p3k209sa13mjvh4k0ghzwnribm48dh9v7lfnnv"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-libc" ,rust-libc-0.2)
         ("rust-memchr" ,rust-memchr-2))))
     (home-page "https://github.com/Freaky/rtss")
@@ -2198,8 +2166,7 @@ (define-public skim
             "1d5v9vq8frkdjm7bnw3455h6xf3c277d51il2qasn7r20kwik7ab"))))
     (build-system cargo-build-system)
     (arguments
-      `(#:tests? ,(not (%current-target-system))
-        #:cargo-inputs
+      `(#:cargo-inputs
         (("rust-atty-0.2" ,rust-atty-0.2)
          ("rust-beef" ,rust-beef-0.5)
          ("rust-bitflags" ,rust-bitflags-1)
@@ -2284,8 +2251,7 @@ (define-public skim-0.7
          (base32
           "1yiyd6fml5hd2l811sckkzmiiq9bd7018ajk4qk3ai4wyvqnw8mv"))))
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-bitflags" ,rust-bitflags-1)
         ("rust-chrono" ,rust-chrono-0.4)
         ("rust-clap" ,rust-clap-2)
@@ -2322,8 +2288,7 @@ (define-public svd2rust
           "0q8slfgjfhpljzlk2myb0i538mfq99q1ljn398jm17r1q2pjjxhv"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-cast" ,rust-cast-0.2)
         ("rust-clap" ,rust-clap-2)
@@ -2357,8 +2322,7 @@ (define-public swayhide
         (base32 "0x172ffj0lfmbv5nix708l1mfsizxzy74gpxp5amvx0bbaq0p78s"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-exitcode" ,rust-exitcode-1)
         ("rust-swayipc" ,rust-swayipc-2))))
     (home-page "https://github.com/NomisIV/swayhide/")
@@ -2441,7 +2405,6 @@ (define-public tealdeer
                           (string-append fish "tealdeer.fish"))
                (copy-file "completion/zsh_tealdeer"
                           (string-append zsh "_tealdeer"))))))
-       #:tests? #~(not (%current-target-system))
        #:install-source? #f
        #:cargo-test-flags
        '("--release" "--"
@@ -2503,8 +2466,7 @@ (define-public git-absorb
         (base32 "04v10bn24acify34vh5ayymsr1flcyb05f3az9k1s2m6nlxy5gb9"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-clap" ,rust-clap-2)
         ("rust-git2" ,rust-git2-0.13)
@@ -2588,8 +2550,7 @@ (define-public zoxide
         (base32 "0y5v2vgl9f3n0n0w4b3iddbfyxv0hls0vw5406ry0hcvnnjyy2l3"))))
     (build-system cargo-build-system)
     (arguments
-     (list #:tests? #~(not (%current-target-system))
-           #:cargo-inputs
+     (list #:cargo-inputs
            `(("rust-anyhow" ,rust-anyhow-1)
              ("rust-askama" ,rust-askama-0.11)
              ("rust-bincode" ,rust-bincode-1)
@@ -2648,8 +2609,7 @@ (define-public htmlq
           (base32 "0912cdkz5xji1hzfj1cf42zh1kd860b52xmwwhb7q2jhp6qk25jh"))))
     (build-system cargo-build-system)
     (arguments
-      `(#:tests? ,(not (%current-target-system))
-        #:cargo-inputs
+      `(#:cargo-inputs
         (("rust-clap" ,rust-clap-2)
          ("rust-html5ever" ,rust-html5ever-0.25)
          ("rust-kuchiki" ,rust-kuchiki-0.8)
diff --git a/gnu/packages/sequoia.scm b/gnu/packages/sequoia.scm
index 500116c14f..6d6733c055 100644
--- a/gnu/packages/sequoia.scm
+++ b/gnu/packages/sequoia.scm
@@ -515,8 +515,7 @@ (define-public sequoia-sqv
     (native-inputs
      (list clang pkg-config))
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f
+     `(#:install-source? #f
        #:cargo-inputs
        (("rust-anyhow" ,rust-anyhow-1)
         ("rust-chrono" ,rust-chrono-0.4)
diff --git a/gnu/packages/syndication.scm b/gnu/packages/syndication.scm
index 7d73ba4a1c..5a9d5ed480 100644
--- a/gnu/packages/syndication.scm
+++ b/gnu/packages/syndication.scm
@@ -252,7 +252,6 @@ (define-public newsboat
      `(#:modules ((guix build cargo-build-system)
                   (guix build utils)
                   ((guix build gnu-build-system) #:prefix gnu:))
-       #:tests? ,(not (%current-target-system))
        #:install-source? #f
        #:cargo-inputs
        (("rust-backtrace" ,rust-backtrace-0.3)
diff --git a/gnu/packages/terminals.scm b/gnu/packages/terminals.scm
index 56803886e3..989fd00e61 100644
--- a/gnu/packages/terminals.scm
+++ b/gnu/packages/terminals.scm
@@ -1524,8 +1524,7 @@ (define-public alacritty
         (base32 "1jbyxnza38c22k7ri8apzn03q91l06isj8la9xca7cz06kn0hha9"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:install-source? #f     ; virtual manifest
+     `(#:install-source? #f     ; virtual manifest
        #:cargo-inputs
        (("rust-alacritty-config" ,rust-alacritty-config-0.1)
         ("rust-alacritty-config-derive" ,rust-alacritty-config-derive-0.2)
diff --git a/gnu/packages/text-editors.scm b/gnu/packages/text-editors.scm
index 1fca31b395..f5714e934a 100644
--- a/gnu/packages/text-editors.scm
+++ b/gnu/packages/text-editors.scm
@@ -226,8 +226,7 @@ (define-public kak-lsp
        (sha256 "1wfv2fy5ga6kc51zka3pak0hq97csm2l11bz74w3n1hrf5q9nnf8")))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-crossbeam-channel" ,rust-crossbeam-channel-0.4)
         ("rust-clap" ,rust-clap-2)
         ("rust-daemonize" ,rust-daemonize-0.4)
@@ -272,8 +271,7 @@ (define-public parinfer-rust
        (file-name (git-file-name name version))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-getopts" ,rust-getopts-0.2)
         ("rust-libc" ,rust-libc-0.2)
         ("rust-emacs" ,rust-emacs-0.11)
diff --git a/gnu/packages/tree-sitter.scm b/gnu/packages/tree-sitter.scm
index 3b3a99c8c8..009f2edeef 100644
--- a/gnu/packages/tree-sitter.scm
+++ b/gnu/packages/tree-sitter.scm
@@ -164,7 +164,6 @@ (define-public tree-sitter-cli
      (list tree-sitter graphviz node-lts))
     (arguments
      (list
-      #:tests? #~(not (%current-target-system))
       #:cargo-test-flags
       ''("--release" "--"
          ;; Skip tests which rely on downloading grammar fixtures.  It is
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 3524aed9b2..b4dd7c27ae 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -5356,8 +5356,7 @@ (define-public rav1e
                    (string-append "\"^" version)))))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-aom-sys" ,rust-aom-sys-0.3)
         ("rust-arbitrary" ,rust-arbitrary-0.4)
         ("rust-arg-enum-proc-macro" ,rust-arg-enum-proc-macro-0.3)
diff --git a/gnu/packages/web.scm b/gnu/packages/web.scm
index ea144fb8c1..b46286c690 100644
--- a/gnu/packages/web.scm
+++ b/gnu/packages/web.scm
@@ -460,8 +460,7 @@ (define-public monolith
         (base32 "1pj4wnsw5a4ys79sqw68ib6zimaqlkplb89x6yncg949a6hj8516"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-atty" ,rust-atty-0.2)
         ("rust-base64" ,rust-base64-0.13)
         ("rust-chrono" ,rust-chrono-0.4)
@@ -1478,7 +1477,7 @@ (define-public krona-tools
                   "ImportTaxonomy"
                   "ImportText"
                   "ImportXML"))
-               (for-each
+               (for-each 
                 (lambda (directory)
                   (copy-recursively directory
                                     (string-append perl "/../" directory)))
@@ -6867,8 +6866,7 @@ (define-public castor
         (base32 "1l72r6a917ymc9pn8dllbal1xdczfai376nvqkiys5fm4j4s3zmj"))))
     (build-system cargo-build-system)
     (arguments
-     `(#:tests? ,(not (%current-target-system))
-       #:cargo-inputs
+     `(#:cargo-inputs
        (("rust-ansi-parser" ,rust-ansi-parser-0.6)
         ("rust-dirs" ,rust-dirs-2)
         ("rust-gdk" ,rust-gdk-0.13)
diff --git a/guix/build-system/cargo.scm b/guix/build-system/cargo.scm
index 5d0800750e..912400a191 100644
--- a/guix/build-system/cargo.scm
+++ b/guix/build-system/cargo.scm
@@ -75,7 +75,7 @@ (define %cargo-build-system-modules
 (define* (cargo-build name inputs
                       #:key
                       source
-                      (tests? #f)
+                      (tests? #t)
                       (test-target #f)
                       (vendor-dir "guix-vendor")
                       (cargo-build-flags ''("--release"))