diff --git a/tests/greenboot-bootc-anaconda-iso.sh b/tests/greenboot-bootc-anaconda-iso.sh
index 0c7e4a9..887defe 100755
--- a/tests/greenboot-bootc-anaconda-iso.sh
+++ b/tests/greenboot-bootc-anaconda-iso.sh
@@ -302,6 +302,18 @@ EOF
         ;;
 esac
 
+# Listing greenboot/greenboot-default-health-checks by name isn't enough to
+# guarantee the Copr build gets picked: dnf always resolves to the highest
+# NEVRA across all enabled repos, and Copr snapshot builds conventionally use
+# a Release starting at "0.<timestamp>...", the same convention official
+# pre-GA/rebuilt packages use. Whenever a base repo ships a greenboot release
+# that outranks the current Copr build, an unscoped reinstall/install would
+# silently fall back to the stock package instead. Restrict resolution to
+# just the just-enabled Copr repo so there is only one candidate regardless
+# of what other repos offer (see commit eb7d75c, which fixed the same class
+# of bug for the ostree/osbuild-composer flow).
+GREENBOOT_COPR_REPO_ID="copr:copr.fedorainfracloud.org:packit:fedora-iot-greenboot-rs-${PR_NUMBER}"
+
 if [[ "${USE_COMPOSE_RPMS}" == true && -n "${GREENBOOT_PACKAGES_URL}" ]]; then
     tee -a Containerfile > /dev/null << EOF
 COPY greenboot-*.rpm /tmp/
@@ -314,7 +326,9 @@ else
 RUN (dnf install -y 'dnf5-command(copr)' || dnf install -y 'dnf-command(copr)') && \
     dnf copr enable -y packit/fedora-iot-greenboot-rs-${PR_NUMBER} ${COPR_CHROOT} && \
     dnf clean metadata && \
-    (dnf reinstall -y greenboot greenboot-default-health-checks || dnf install -y greenboot greenboot-default-health-checks) && \
+    dnf download --from-repo='${GREENBOOT_COPR_REPO_ID}' --destdir /tmp/copr-rpms greenboot greenboot-default-health-checks && \
+    dnf install -y /tmp/copr-rpms/*.rpm && \
+    rm -rf /tmp/copr-rpms && \
     systemctl enable greenboot-healthcheck.service
 EOF
 fi
diff --git a/tests/greenboot-bootc-qcow2.sh b/tests/greenboot-bootc-qcow2.sh
index 474a619..fe558a6 100755
--- a/tests/greenboot-bootc-qcow2.sh
+++ b/tests/greenboot-bootc-qcow2.sh
@@ -302,6 +302,18 @@ EOF
         ;;
 esac
 
+# Listing greenboot/greenboot-default-health-checks by name isn't enough to
+# guarantee the Copr build gets picked: dnf always resolves to the highest
+# NEVRA across all enabled repos, and Copr snapshot builds conventionally use
+# a Release starting at "0.<timestamp>...", the same convention official
+# pre-GA/rebuilt packages use. Whenever a base repo ships a greenboot release
+# that outranks the current Copr build, an unscoped reinstall/install would
+# silently fall back to the stock package instead. Restrict resolution to
+# just the just-enabled Copr repo so there is only one candidate regardless
+# of what other repos offer (see commit eb7d75c, which fixed the same class
+# of bug for the ostree/osbuild-composer flow).
+GREENBOOT_COPR_REPO_ID="copr:copr.fedorainfracloud.org:packit:fedora-iot-greenboot-rs-${PR_NUMBER}"
+
 if [[ "${USE_COMPOSE_RPMS}" == true && -n "${GREENBOOT_PACKAGES_URL}" ]]; then
     tee -a Containerfile > /dev/null << EOF
 COPY greenboot-*.rpm /tmp/
@@ -314,7 +326,9 @@ else
 RUN (dnf install -y 'dnf5-command(copr)' || dnf install -y 'dnf-command(copr)') && \
     dnf copr enable -y packit/fedora-iot-greenboot-rs-${PR_NUMBER} ${COPR_CHROOT} && \
     dnf clean metadata && \
-    (dnf reinstall -y greenboot greenboot-default-health-checks || dnf install -y greenboot greenboot-default-health-checks) && \
+    dnf download --from-repo='${GREENBOOT_COPR_REPO_ID}' --destdir /tmp/copr-rpms greenboot greenboot-default-health-checks && \
+    dnf install -y /tmp/copr-rpms/*.rpm && \
+    rm -rf /tmp/copr-rpms && \
     systemctl enable greenboot-healthcheck.service
 EOF
 fi
diff --git a/tests/greenboot-fedora-iot-raw.sh b/tests/greenboot-fedora-iot-raw.sh
index 7a48d03..7e3abca 100755
--- a/tests/greenboot-fedora-iot-raw.sh
+++ b/tests/greenboot-fedora-iot-raw.sh
@@ -308,9 +308,21 @@ if [[ $copr_result != 0 ]]; then
     exit 1
 fi
 
+# Listing greenboot/greenboot-default-health-checks by name isn't enough to
+# guarantee the Copr build gets picked: dnf always resolves to the highest
+# NEVRA across all enabled repos, and Copr snapshot builds conventionally use
+# a Release starting at "0.<timestamp>...", the same convention official
+# pre-GA/rebuilt packages use. Whenever BaseOS/AppStream/Fedora ships a
+# greenboot release that outranks the current Copr build, an unscoped
+# download would silently fetch the stock package instead. Restrict
+# resolution to just the just-enabled Copr repo so there is only one
+# candidate regardless of what other repos offer (see commit eb7d75c, which
+# fixed the same class of bug for the ostree/osbuild-composer flow).
+GREENBOOT_COPR_REPO_ID="copr:copr.fedorainfracloud.org:packit:fedora-iot-greenboot-rs-${PR_NUMBER}"
+
 greenprint "📦 Downloading greenboot RPMs from Copr"
 ssh "${SSH_OPTIONS[@]}" -i "${SSH_KEY}" "${SSH_USER}@${GUEST_ADDRESS}" \
-    "dnf download --destdir /tmp/greenboot-rpms greenboot greenboot-default-health-checks"
+    "dnf download --from-repo='${GREENBOOT_COPR_REPO_ID}' --destdir /tmp/greenboot-rpms greenboot greenboot-default-health-checks"
 
 greenprint "📦 Replacing greenboot packages with PR build"
 ssh "${SSH_OPTIONS[@]}" -i "${SSH_KEY}" "${SSH_USER}@${GUEST_ADDRESS}" \