diff --git a/.cirrus.yml b/.cirrus.yml
index 5f82269..56f8a49 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -15,25 +15,20 @@ task:
   # Use the maximum timeout. Needed when rebuilding packages on a channel update.
   timeout_in: 120m
 
+  name: modules_test
+  environment:
+    nixpkgs: nixpkgs
+  container:
+    # A maximum of 16 CPUs is shared among all concurrent tasks.
+    # https://cirrus-ci.org/faq/#are-there-any-limits
+    cpu: 4
   matrix:
-    - name: modules_test
-      environment:
-        nixpkgs: nixpkgs
-      container:
-        # A maximum of 16 CPUs is shared among all concurrent tasks.
-        # https://cirrus-ci.org/faq/#are-there-any-limits
-        cpu: 4
-      matrix:
-        - environment:
-            scenario: default
-        - environment:
-            scenario: netns
-        - environment:
-            scenario: netnsRegtest
-
-    - name: pkgs_unstable
-      environment:
-        nixpkgs: nixpkgs-unstable
+    - environment:
+        scenario: default
+    - environment:
+        scenario: netns
+    - environment:
+        scenario: netnsRegtest
 
   # This script is run as root
   build_script:
diff --git a/flake.lock b/flake.lock
index 32d1069..1bcfb60 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1634851050,
-        "narHash": "sha256-N83GlSGPJJdcqhUxSCS/WwW5pksYf3VP1M13cDRTSVA=",
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c91f3de5adaf1de973b797ef7485e441a65b8935",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1636333654,
-        "narHash": "sha256-3wh9PtCzcaJQuZrgZ+ygKfhltkDNNqT6zOzGsRbjZEo=",
+        "lastModified": 1637973395,
+        "narHash": "sha256-wp/QgsnnKJAIMZeQgJT1bWQ/OutZ+80lHwtpYAUWDfE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e74894146a42ba552ebafa19ab2d1df7ccbc1738",
+        "rev": "4f37689c8a219a9d756c5ff38525ad09349f422f",
         "type": "github"
       },
       "original": {
@@ -33,11 +33,11 @@
     },
     "nixpkgsUnstable": {
       "locked": {
-        "lastModified": 1636470166,
-        "narHash": "sha256-0tyWSS5rgMtML5p41ZdE5ocuAnRdtOGvdsqQyMUBYAI=",
+        "lastModified": 1638036523,
+        "narHash": "sha256-ZL6gogsuBmhBvIro+YwRKrypYhwVPCOOO7FmhOV/xyE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f096b7122ab08e93c8b052c92461ca71b80c0cc8",
+        "rev": "9c191ebcdfe917043195c54ab6ae8e934434fe7b",
         "type": "github"
       },
       "original": {
diff --git a/modules/electrs.nix b/modules/electrs.nix
index 3dee769..5e056e0 100644
--- a/modules/electrs.nix
+++ b/modules/electrs.nix
@@ -79,7 +79,8 @@ in {
         # electrs only uses the working directory for reading electrs.toml
         WorkingDirectory = "/run/electrs";
         ExecStart = ''
-          ${config.nix-bitcoin.pkgs.electrs}/bin/electrs -vv \
+          ${config.nix-bitcoin.pkgs.electrs}/bin/electrs \
+          --log-filters=INFO \
           --network=${bitcoind.makeNetworkName "bitcoin" "regtest"} \
           --db-dir='${cfg.dataDir}' \
           --daemon-dir='${bitcoind.dataDir}' \
diff --git a/test/pkgs-unstable.nix b/test/pkgs-unstable.nix
deleted file mode 100644
index 442bec0..0000000
--- a/test/pkgs-unstable.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-let
-  pinned = import ../pkgs/nixpkgs-pinned.nix;
-  pkgs = import pinned.nixpkgs-unstable {};
-  nbPkgs = import ../pkgs { inherit pkgs; };
-  pkgsUnstable = with nbPkgs; [
-    # Disabled because joinmarket dependencies currently don't build on on unstable.
-    # joinmarket
-    rtl
-    cl-rest
-  ];
-in
-pkgs.writeText "pkgs-unstable" (pkgs.lib.concatMapStringsSep "\n" toString pkgsUnstable)
diff --git a/test/run-tests.sh b/test/run-tests.sh
index ddf3eb0..a4cddfe 100755
--- a/test/run-tests.sh
+++ b/test/run-tests.sh
@@ -246,10 +246,6 @@ vmTestNixExpr() {
 EOF
 }
 
-pkgsUnstable() {
-    doBuild pkgs-unstable "$scriptDir/pkgs-unstable.nix"
-}
-
 # A basic subset of tests to keep the total runtime within
 # manageable bounds (<4 min on desktop systems).
 # These are also run on the CI server.
@@ -257,7 +253,6 @@ basic() {
     scenario=default buildTest "$@"
     scenario=netns buildTest "$@"
     scenario=netnsRegtest buildTest "$@"
-    pkgsUnstable
 }
 
 # All tests that only consist of building a nix derivation.