diff --git a/test/Dockerfile.jammy b/test/Dockerfile.jammy
index 15c76a4631..7884078a50 100644
--- a/test/Dockerfile.jammy
+++ b/test/Dockerfile.jammy
@@ -66,7 +66,7 @@ RUN install-tool helmfile v0.161.0
 RUN install-tool kustomize 5.3.0
 
 # renovate: datasource=github-tags packageName=NixOS/nix
-RUN install-tool nix 2.19.3
+RUN install-tool nix 2.20.0
 
 # renovate: datasource=github-releases packageName=PowerShell/PowerShell
 RUN install-tool powershell v7.4.1
diff --git a/test/nix/Dockerfile b/test/nix/Dockerfile
index bb7e5e2711..794ca75152 100644
--- a/test/nix/Dockerfile
+++ b/test/nix/Dockerfile
@@ -55,7 +55,7 @@ FROM base as testb
 USER 1000
 
 # renovate: datasource=github-tags packageName=NixOS/nix
-RUN install-tool nix 2.19.3
+RUN install-tool nix 2.20.0
 
 RUN set -ex; \
   nix --version
diff --git a/test/nix/Dockerfile.arm64 b/test/nix/Dockerfile.arm64
index 902c32965f..958fffb189 100644
--- a/test/nix/Dockerfile.arm64
+++ b/test/nix/Dockerfile.arm64
@@ -22,7 +22,7 @@ RUN install-containerbase
 FROM base as test-nix
 
 # renovate: datasource=github-tags packageName=NixOS/nix
-RUN install-tool nix 2.19.3
+RUN install-tool nix 2.20.0
 
 #--------------------------------------
 # Image: final