diff --git a/nixos/tests/firefox.nix b/nixos/tests/firefox.nix
index 9bb78a97f36d..3f9cea6662fb 100644
--- a/nixos/tests/firefox.nix
+++ b/nixos/tests/firefox.nix
@@ -8,7 +8,7 @@ let firefoxPackage' = firefoxPackage.override (args: {
 
 in
 {
-  name = firefoxPackage'.unwrapped.binaryName;
+  name = firefoxPackage'.unwrapped.pname;
   meta = with pkgs.lib.maintainers; {
     maintainers = [ eelco shlevy ];
   };
diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 6ea82d80853e..7f9e1c27f5d5 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -27,7 +27,7 @@ rec {
   };
 
   firefox-esr-102 = buildMozillaMach rec {
-    pname = "firefox-esr";
+    pname = "firefox-esr-102";
     version = "102.1.0esr";
     applicationName = "Mozilla Firefox ESR";
     src = fetchurl {
@@ -54,7 +54,7 @@ rec {
   };
 
   firefox-esr-91 = buildMozillaMach rec {
-    pname = "firefox-esr";
+    pname = "firefox-esr-91";
     version = "91.12.0esr";
     applicationName = "Mozilla Firefox ESR";
     src = fetchurl {
diff --git a/pkgs/development/libraries/nspr/default.nix b/pkgs/development/libraries/nspr/default.nix
index 9fec80aa56ea..f3c5ac668cff 100644
--- a/pkgs/development/libraries/nspr/default.nix
+++ b/pkgs/development/libraries/nspr/default.nix
@@ -3,6 +3,7 @@
 , fetchurl
 , CoreServices
 , buildPackages
+, nixosTests
 }:
 
 stdenv.mkDerivation rec {
@@ -44,6 +45,10 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  passthru.tests = {
+    inherit (nixosTests) firefox firefox-esr-91 firefox-esr-102;
+  };
+
   meta = with lib; {
     homepage = "https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Reference/NSPR_functions";
     description = "Netscape Portable Runtime, a platform-neutral API for system-level and libc-like functions";
diff --git a/pkgs/development/libraries/nss/generic.nix b/pkgs/development/libraries/nss/generic.nix
index 9a3d7bdfe270..febc2423388e 100644
--- a/pkgs/development/libraries/nss/generic.nix
+++ b/pkgs/development/libraries/nss/generic.nix
@@ -15,6 +15,7 @@
 , # allow FIPS mode. Note that this makes the output non-reproducible.
   # https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_Tech_Notes/nss_tech_note6
   enableFIPS ? false
+, nixosTests
 }:
 
 let
@@ -186,6 +187,12 @@ stdenv.mkDerivation rec {
 
   passthru.updateScript = ./update.sh;
 
+  passthru.tests = lib.optionalAttrs (lib.versionOlder version "3.69") {
+    inherit (nixosTests) firefox-esr-91;
+  } // lib.optionalAttrs (lib.versionAtLeast version "3.69") {
+    inherit (nixosTests) firefox firefox-esr-102;
+  };
+
   meta = with lib; {
     homepage = "https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS";
     description = "A set of libraries for development of security-enabled client and server applications";