diff --git a/gnu/packages/aidc.scm b/gnu/packages/aidc.scm
index 24738a4c010..d8aa9ab2f97 100644
--- a/gnu/packages/aidc.scm
+++ b/gnu/packages/aidc.scm
@@ -68,6 +68,7 @@
     (build-system qt-build-system)
     (arguments
      (list #:qtbase qtbase
+           #:parallel-tests? #f
            #:configure-flags
            #~(list "-DZINT_QT6=ON"
                    "-DZINT_TEST=ON"
diff --git a/gnu/packages/calendar.scm b/gnu/packages/calendar.scm
index faf7779ce73..1ea278fbd5e 100644
--- a/gnu/packages/calendar.scm
+++ b/gnu/packages/calendar.scm
@@ -172,6 +172,7 @@ algorithms library for calendar dates and durations.  It also provides the
     (build-system cmake-build-system)
     (arguments
      (list
+      #:parallel-tests? #f
       #:configure-flags #~(list "-DSHARED_ONLY=true"
                                 ;; required by evolution-data-server
                                 "-DGOBJECT_INTROSPECTION=true"
diff --git a/gnu/packages/compression.scm b/gnu/packages/compression.scm
index e289dbe7d34..12c304acc48 100644
--- a/gnu/packages/compression.scm
+++ b/gnu/packages/compression.scm
@@ -875,6 +875,7 @@ with the sfArk algorithm.")
     (build-system cmake-build-system)
     (arguments
      (list
+      #:parallel-tests? #f
       #:configure-flags #~(list "-DBUILD_SHARED_LIBS=ON"
                                 "-DMZ_BUILD_TESTS=ON"
                                 "-DMZ_BUILD_UNIT_TESTS=ON"
@@ -2872,7 +2873,8 @@ computations.")
                 "17kqwvw2n6bgzidi8f5906s5hc9wm1lbfbpd491gf7csxjck99sx"))))
     (build-system cmake-build-system)
     (arguments
-     (list #:configure-flags #~(list "-DBUILD_STATIC=OFF"
+     (list #:parallel-tests? #f
+           #:configure-flags #~(list "-DBUILD_STATIC=OFF"
                                      "-DDEACTIVATE_AVX2=ON"
                                      "-DDEACTIVATE_AVX512=ON"
                                      "-DPREFER_EXTERNAL_LZ4=ON"
diff --git a/gnu/packages/cpp.scm b/gnu/packages/cpp.scm
index c5d00e341e1..c6545aaf4be 100644
--- a/gnu/packages/cpp.scm
+++ b/gnu/packages/cpp.scm
@@ -1649,7 +1649,8 @@ tools:
        (file-name (git-file-name name version))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags
+     `(#:parallel-tests? #f
+       #:configure-flags
        '("-DBUILD_SHARED_LIBS=ON"
          "-DHTTPLIB_TEST=ON"
          "-DHTTPLIB_COMPILE=ON"
diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index f72bc5525e2..0a4de600652 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -3727,7 +3727,8 @@ extension and customization.")
     (build-system cmake-build-system)
     (inputs (list hdf5-1.10))
     (arguments
-     `(#:phases
+     `(#:parallel-tests? #f
+       #:phases
        (modify-phases %standard-phases
          (add-after 'install 'remove-test-output
            (lambda* (#:key outputs #:allow-other-keys)
diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index b63b50aae1e..93c70b75d10 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -8415,6 +8415,7 @@ Microsoft Exchange, Last.fm, IMAP/SMTP, Jabber, SIP and Kerberos.")
     (build-system cmake-build-system)
     (arguments
      (list
+      #:parallel-tests? #f
       #:configure-flags
       #~(let* ((lib (string-append #$output "/lib"))
                (runpaths (map (lambda (s)
diff --git a/gnu/packages/image-processing.scm b/gnu/packages/image-processing.scm
index 6e42be11404..ff60a735223 100644
--- a/gnu/packages/image-processing.scm
+++ b/gnu/packages/image-processing.scm
@@ -541,7 +541,8 @@ different data arrays similar to those available in the numdiff software.")
                 "1ha0230yw9ihybmg2b3mkk9vbnlgzlwx597v2hm14y403047zvgb"))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags
+     `(#:parallel-tests? #f
+       #:configure-flags
        (list "-DWITH_ADE=OFF"           ;we don't have a package for ade yet
              "-DWITH_IPP=OFF"
              "-DWITH_ITT=OFF"
diff --git a/gnu/packages/kde-frameworks.scm b/gnu/packages/kde-frameworks.scm
index 6bbff9caf28..ec6a8bb4526 100644
--- a/gnu/packages/kde-frameworks.scm
+++ b/gnu/packages/kde-frameworks.scm
@@ -4557,6 +4557,7 @@ typed.")
      (list kcrash kdbusaddons kdoctools ki18n qtbase qtdeclarative))
     (arguments
      (list
+      #:parallel-tests? #f
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'unpack 'patch
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index d80ef8abbeb..5fade6baba9 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -5454,7 +5454,8 @@ implemented in ANSI C, and MPI for communications.")
      (list flex bison gfortran))
     (outputs '("out" "metis"))
     (arguments
-     (list #:configure-flags #~'("-DBUILD_SHARED_LIBS=YES" "-DINTSIZE=64"
+     (list #:parallel-tests? #f
+           #:configure-flags #~'("-DBUILD_SHARED_LIBS=YES" "-DINTSIZE=64"
                                  "-DBUILD_PTSCOTCH=OFF")
            #:phases
            #~(modify-phases %standard-phases
diff --git a/gnu/packages/networking.scm b/gnu/packages/networking.scm
index 19d09cf603a..4015b85670b 100644
--- a/gnu/packages/networking.scm
+++ b/gnu/packages/networking.scm
@@ -726,7 +726,8 @@ from any network device in any of three ASCII graph formats.")
         (base32 "1zr1l9zkai7rpw9cn5j9h4zrv08hgpfmwscwyscf2j4cgwf0rxrr"))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags
+     `(#:parallel-tests? #f
+       #:configure-flags
        (list
         (string-append "-DCMAKE_INSTALL_BINDIR="
                        (assoc-ref %outputs "out") "/bin")
@@ -3887,7 +3888,10 @@ never see any machines other than the one Dante is running on.")
     (inputs
      (list asio catch-framework openssl))
     (arguments
-     `(#:configure-flags
+     `(;; Running parallel tests results in "bind: Address already in use" error
+       ;; in test service_status_feature_test_suite.
+       #:parallel-tests? #f
+       #:configure-flags
        '("-DBUILD_SSL=NO")
        #:phases
        (modify-phases %standard-phases
@@ -3932,6 +3936,8 @@ communication over HTTP.")
     (build-system cmake-build-system)
     (arguments
      (list
+      ;; Error when tests are run in parallel: "bind: Address already in use".
+      #:parallel-tests? #f
       #:configure-flags
       #~(list "-DRESTINIO_INSTALL=ON"
               "-DRESTINIO_TEST=ON"
diff --git a/gnu/packages/tbb.scm b/gnu/packages/tbb.scm
index 926e9dcad47..5fdc41553bf 100644
--- a/gnu/packages/tbb.scm
+++ b/gnu/packages/tbb.scm
@@ -50,7 +50,8 @@
                                        "tbb-gcc-14.patch"))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags
+     `(#:parallel-tests? #f
+       #:configure-flags
        '(,@(if (or (target-riscv64?)
                    (target-ppc32?))
                '("-DTBB_TEST_LINK_FLAGS=-latomic")
diff --git a/gnu/packages/tls.scm b/gnu/packages/tls.scm
index 79bfe7827fa..282ef82aa07 100644
--- a/gnu/packages/tls.scm
+++ b/gnu/packages/tls.scm
@@ -978,7 +978,8 @@ number generator")
         (base32 "0ldqhvmj9wl0yp3hz675zbnq69lw533s0ahy9bbdxxnj5gjb86gw"))))
     (build-system cmake-build-system)
     (arguments
-     (list #:configure-flags
+     (list #:parallel-tests? #f
+           #:configure-flags
            #~(list "-DCMAKE_C_FLAGS=-Wno-error=calloc-transposed-args"
                    "-DUSE_SHARED_MBEDTLS_LIBRARY=ON"
                    "-DUSE_STATIC_MBEDTLS_LIBRARY=OFF")
diff --git a/gnu/packages/vulkan.scm b/gnu/packages/vulkan.scm
index 1df4e9d1c5d..a866d7b3a38 100644
--- a/gnu/packages/vulkan.scm
+++ b/gnu/packages/vulkan.scm
@@ -371,6 +371,7 @@ Enhanced Subpixel Morphological Anti-Aliasing
       ;; Limit the tests to those architectures tested upstream.
       #:tests? (and (not (%current-target-system))
                     (target-x86?))
+      #:parallel-tests? #f
       #:configure-flags
       #~(list (string-append "-DVULKAN_HEADERS_INSTALL_DIR="
                              (dirname (dirname
diff --git a/gnu/packages/web.scm b/gnu/packages/web.scm
index e3f75620840..0080c9b4590 100644
--- a/gnu/packages/web.scm
+++ b/gnu/packages/web.scm
@@ -1991,7 +1991,8 @@ features.")
        (patches (search-patches "websocketpp-fix-for-cmake-3.15.patch"))))
     (build-system cmake-build-system)
     (inputs (list boost openssl))
-    (arguments '(#:configure-flags '("-DBUILD_TESTS=ON")
+    (arguments '(#:parallel-tests? #f
+                 #:configure-flags '("-DBUILD_TESTS=ON")
                  #:phases
                  (modify-phases %standard-phases
                    (add-after 'install 'remove-tests