build-system/pyproject: Always run tests verbosely for supported backends.

* guix/build-system/pyproject.scm (pyproject-build): Default to '() instead of
 #false for TEST-FLAGS.
* guix/build/pyproject-build-system.scm (check): Unconditionally enable
verbose test flags.
* doc/guix.texi (Build Systems): Document this change.
* gnu/packages/fontutils.scm (python-glyphslib)[arguments]: Remove verbosity
from #:test-flags.
* gnu/packages/pdf.scm (python-pydyf, weasyprint)[arguments]: Likewise.
* gnu/packages/python-web.scm (python-openapi-spec-validator)[arguments]: Likewise.
* gnu/packages/python-xyz.scm (python-path, python-tempora)[arguments]: Likewise.

4 files changed, 6 insertions, 7 deletions

diff --git a/gnu/packages/fontutils.scm b/gnu/packages/fontutils.scm
index df3774e977..368aad49d6 100644
--- a/gnu/packages/fontutils.scm
+++ b/gnu/packages/fontutils.scm
@@ -598,8 +598,7 @@ process.  FontParts is the successor of RoboFab.")
     (build-system pyproject-build-system)
     (arguments
      (list
-      #:test-flags #~'("-vv"
-                       ;; These fail because the test data has not yet been
+      #:test-flags #~'(;; These fail because the test data has not yet been
                        ;; updated for newer FontTools:
                        ;;   https://github.com/googlefonts/glyphsLib/issues/787
                        ;; Re-enable for versions > 6.0.7.
diff --git a/gnu/packages/pdf.scm b/gnu/packages/pdf.scm
index 95cc3b1e22..070dc59ac0 100644
--- a/gnu/packages/pdf.scm
+++ b/gnu/packages/pdf.scm
@@ -739,7 +739,7 @@ extracting content or merging files.")
     (build-system pyproject-build-system)
     (arguments
      (list
-      #:test-flags #~'("-vv" "-c" "/dev/null")))
+      #:test-flags #~'("-c" "/dev/null")))
     (propagated-inputs (list python-pillow))
     (native-inputs
      (list ghostscript
@@ -1500,7 +1500,7 @@ manipulating PDF documents from the command line.  It supports
     (build-system pyproject-build-system)
     (arguments
      (list
-      #:test-flags #~(list "-vv" "-c" "/dev/null"
+      #:test-flags #~(list "-c" "/dev/null"
                            "-n" (number->string (parallel-job-count)))
       #:phases
       #~(modify-phases %standard-phases
diff --git a/gnu/packages/python-web.scm b/gnu/packages/python-web.scm
index cbc515fc64..59d677ca35 100644
--- a/gnu/packages/python-web.scm
+++ b/gnu/packages/python-web.scm
@@ -1648,7 +1648,7 @@ JSON Schema Specification Draft 2020-12.
      (list
       ;; The example tests attempt to fetch resources from the Internet
       ;; (see: https://github.com/p1c2u/openapi-spec-validator/issues/151).
-      #:test-flags #~'("-vv" "-k" "not Example and not Exampe")
+      #:test-flags #~'("-k" "not Example and not Exampe")
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'unpack 'remove-coverage-pytest-options
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 18089d090e..1c2f9d7b73 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -12753,7 +12753,7 @@ invoked on those path objects directly.")
        ((#:tests? _ #f)
         (not (%current-target-system)))
        ((#:test-flags flags #~'())
-        #~(append (list "-vv" "-k"
+        #~(append (list "-k"
                         (string-append
                          ;; Do not test the myproject.toml build as it tries
                          ;; to pull dependencies from the Internet.
@@ -21366,7 +21366,7 @@ particularly convenient for use in tests.")
     (arguments
      ;; Do not test the myproject.toml build as it tries to pull
      ;; dependencies from the Internet.
-     (list #:test-flags #~'("-vv" "-k" "not project")))
+     (list #:test-flags #~'("-k" "not project")))
     (native-inputs
      (list python-freezegun
            python-pytest