diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index 8f60929e2f7c..af1184a973b8 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -68,8 +68,11 @@ stdenv.mkDerivation rec {
     description = "Open source IMAP and POP3 email server written with security primarily in mind";
     maintainers = with stdenv.lib.maintainers; [ peti rickynils fpletz ];
     platforms = stdenv.lib.platforms.unix;
-    tests = {
-      opensmtpd-interaction = nixosTests.opensmtpd;
-    };
+    # https://github.com/NixOS/nixpkgs/issues/50230 must be resolved before
+    # this can be enabled.
+    #
+    # tests = {
+    #   opensmtpd-interaction = nixosTests.opensmtpd;
+    # };
   };
 }
diff --git a/pkgs/servers/mail/opensmtpd/default.nix b/pkgs/servers/mail/opensmtpd/default.nix
index 0ee1c92acbdc..5efaca40f6ee 100644
--- a/pkgs/servers/mail/opensmtpd/default.nix
+++ b/pkgs/servers/mail/opensmtpd/default.nix
@@ -61,8 +61,11 @@ stdenv.mkDerivation rec {
     license = licenses.isc;
     platforms = platforms.linux;
     maintainers = with maintainers; [ rickynils obadz ekleog ];
-    tests = {
-      basic-functionality-and-dovecot-interaction = nixosTests.opensmtpd;
-    };
+    # https://github.com/NixOS/nixpkgs/issues/50230 must be resolved before
+    # this can be enabled.
+    #
+    # tests = {
+    #   basic-functionality-and-dovecot-interaction = nixosTests.opensmtpd;
+    # };
   };
 }