diff --git a/CHANGELOG.md b/CHANGELOG.md
index bce0c07..d34560a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## v3.0.4
+
+* `lib/swupd`: Add tests and more operations (credit: @mondeja)
+* `lib/conda/Qo`: added (credit: @anntzer)
+* `lib/yum/Qe`: Added (credit: @mondeja)
+* `yum` or `dnf`: Tests improvements (credit: @mondeja)
+
 ## v3.0.3
 
 Minor bug fixes and features added.
diff --git a/README.md b/README.md
index 874a967..a6f99e2 100644
--- a/README.md
+++ b/README.md
@@ -126,10 +126,10 @@ A long list of options and operations can be found from [`ArchLinux`'s wiki](htt
 pkg_tools  ~        *     *     *  *     * *  *   *  ~ *  *   x          *      *  ~  *   *  x  
   portage  *  *     *     *     *        * *         * *  *   *    *     *         *  *   *  *  
 sun_tools  *        *     *     *     *    *                                                   *
-    swupd              *        *     *    *           *                           *  *   *  *  
+    swupd  *        *  *        *     *    *           *  *   *                    *  *   *  *  
    tazpkg  *        *     *     *          *           *  *   *                    *  *   *  * *
     tlmgr           *  *  *                *           *                 *      *  *      *    *
-      yum  *  *     *     *  *  *  *  *  * *         * *  *   *    *  *  *   *     *  *   *  * *
+      yum  *  *  *  *     *  *  *  *  *  * *         * *  *   *    *  *  *   *     *  *   *  * *
    zypper  *  *     *     *  *  *  *  *  * *  *   *  * *  *   *    *  *  *   *  *  *  *   *  * *
 ```
 
diff --git a/pacapt b/pacapt
index 6e85cb8..83f92d2 100755
--- a/pacapt
+++ b/pacapt
@@ -3,7 +3,7 @@
 # Purpose: A wrapper for all Unix package managers
 # License: Fair license (http://www.opensource.org/licenses/fair)
 # Source : http://github.com/icy/pacapt/
-# Version: 3.0.3
+# Version: 3.0.4
 # Authors: Anh K. Huynh et al.
 
 # Copyright (C) 2010 - 2021 \
@@ -46,7 +46,7 @@
 
 _print_pacapt_version() {
   cat <<_EOF_
-pacapt version '3.0.3'
+pacapt version '3.0.4'
 
 Copyright (C) 2010 - 2021 \\
                           | 10sr (10sr)
@@ -87,7 +87,7 @@ DISCLAIMER: THE WORKS ARE WITHOUT WARRANTY.
 _EOF_
 }
 
-export PACAPT_VERSION='3.0.3'
+export PACAPT_VERSION='3.0.4'
 
 _help() {
   cat <<'EOF'
@@ -802,6 +802,10 @@ conda_Q() {
   fi
 }
 
+conda_Qo() {
+  conda package --which "$@"
+}
+
 conda_R() {
   conda remove "$@"
 }
@@ -1847,6 +1851,14 @@ _swupd_init() {
   :
 }
 
+swupd_Q() {
+  swupd bundle-list "$@"
+}
+
+swupd_Qi() {
+  swupd bundle-info "$@"
+}
+
 swupd_Qk() {
   swupd verify "$@"
 }
@@ -1867,6 +1879,14 @@ swupd_R() {
   swupd bundle-remove "$@"
 }
 
+swupd_Sc() {
+  swupd clean "$@"
+}
+
+swupd_Scc() {
+  swupd clean --all "$@"
+}
+
 swupd_Suy() {
   swupd update
 }
@@ -1876,7 +1896,6 @@ swupd_Su() {
 }
 
 swupd_Sy() {
-  swupd search -i
   swupd update
 }
 
@@ -2086,6 +2105,15 @@ yum_Q() {
   fi
 }
 
+yum_Qe() {
+  # in Centos8, repoquery takes 'reason' as format placeholder
+  centos_version="$($GREP -ohP '(?<=VERSION_ID=")([^"]+)(?=")' /etc/*elease)"
+  [ "$centos_version" -eq "8" ] && reason="reason" || reason="yumdb_info.reason"
+
+  repoquery --installed --qf "%{name} - %{$reason}" --all \
+    | $GREP 'user$' | cut -d' ' -f1
+}
+
 yum_Qi() {
   yum info "$@"
 }
@@ -2418,6 +2446,7 @@ _validate_operation() {
   "cave_S") ;;
   "cave_U") ;;
   "conda_Q") ;;
+  "conda_Qo") ;;
   "conda_R") ;;
   "conda_S") ;;
   "conda_Sc") ;;
@@ -2577,10 +2606,14 @@ _validate_operation() {
   "sun_tools_Q") ;;
   "sun_tools_R") ;;
   "sun_tools_U") ;;
+  "swupd_Q") ;;
+  "swupd_Qi") ;;
   "swupd_Qk") ;;
   "swupd_Qo") ;;
   "swupd_Qs") ;;
   "swupd_R") ;;
+  "swupd_Sc") ;;
+  "swupd_Scc") ;;
   "swupd_Suy") ;;
   "swupd_Su") ;;
   "swupd_Sy") ;;
@@ -2610,6 +2643,7 @@ _validate_operation() {
   "tlmgr_Suy") ;;
   "tlmgr_U") ;;
   "yum_Q") ;;
+  "yum_Qe") ;;
   "yum_Qi") ;;
   "yum_Qs") ;;
   "yum_Ql") ;;