diff --git a/docker/client.Dockerfile b/docker/client.Dockerfile
deleted file mode 100644
index e05b7249..00000000
--- a/docker/client.Dockerfile
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM ubuntu:22.04
-
-RUN apt-get update && \
-  apt-get install -y dnsutils iputils-ping tshark vim
\ No newline at end of file
diff --git a/docker/nsd.Dockerfile b/docker/nsd.Dockerfile
deleted file mode 100644
index 2284ebb8..00000000
--- a/docker/nsd.Dockerfile
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM ubuntu:22.04
-
-RUN apt-get update && \
-  apt-get install -y nsd iputils-ping tshark vim
diff --git a/docker/unbound.Dockerfile b/docker/unbound.Dockerfile
index 67e89404..51c75d45 100644
--- a/docker/unbound.Dockerfile
+++ b/docker/unbound.Dockerfile
@@ -1,6 +1,6 @@
 FROM ubuntu:22.04
 
 RUN apt-get update && \
-  apt-get install -y unbound iputils-ping tshark vim
+  apt-get install -y dnsutils unbound nsd iputils-ping tshark vim
 
 COPY ./files/etc/unbound/unbound.conf /etc/unbound/unbound.conf
diff --git a/src/container.rs b/src/container.rs
index 9c16cfe2..dbdfc0b8 100644
--- a/src/container.rs
+++ b/src/container.rs
@@ -7,7 +7,7 @@ use std::sync::atomic::AtomicUsize;
 
 use tempfile::NamedTempFile;
 
-use crate::{Image, Result};
+use crate::Result;
 
 pub struct Container {
     id: String,
@@ -16,15 +16,17 @@ pub struct Container {
 
 impl Container {
     /// Starts the container in a "parked" state
-    pub fn run(image: Image) -> Result<Self> {
+    pub fn run() -> Result<Self> {
         static COUNT: AtomicUsize = AtomicUsize::new(0);
 
-        let image_tag = format!("dnssec-tests-{image}");
+        // TODO configurable: hickory; bind
+        let binary = "unbound";
+        let image_tag = format!("dnssec-tests-{binary}");
 
         let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
         let dockerfile_path = manifest_dir
             .join("docker")
-            .join(format!("{image}.Dockerfile"));
+            .join(format!("{binary}.Dockerfile"));
         let docker_dir_path = manifest_dir.join("docker");
         dbg!(&image_tag);
 
@@ -44,7 +46,7 @@ impl Container {
         let mut command = Command::new("docker");
         let pid = process::id();
         let container_name = format!(
-            "{image}-{pid}-{}",
+            "{binary}-{pid}-{}",
             COUNT.fetch_add(1, atomic::Ordering::Relaxed)
         );
         command.args(&["run", "--rm", "--detach", "--name", &container_name]);
@@ -156,7 +158,7 @@ mod tests {
 
     #[test]
     fn run_works() -> Result<()> {
-        let container = Container::run(Image::Client)?;
+        let container = Container::run()?;
 
         let output = container.exec(&["true"])?;
         assert!(output.status.success());
@@ -166,7 +168,7 @@ mod tests {
 
     #[test]
     fn ip_addr_works() -> Result<()> {
-        let container = Container::run(Image::Client)?;
+        let container = Container::run()?;
 
         let ip_addr = container.ip_addr()?;
         assert!(ip_addr.parse::<Ipv4Addr>().is_ok());
@@ -176,7 +178,7 @@ mod tests {
 
     #[test]
     fn cp_works() -> Result<()> {
-        let container = Container::run(Image::Client)?;
+        let container = Container::run()?;
 
         let path = "/tmp/somefile";
         let contents = "hello";
diff --git a/src/lib.rs b/src/lib.rs
index a6eab726..c10f90e0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,20 +23,3 @@ impl Domain<'_> {
         }
     }
 }
-
-pub enum Image {
-    Nsd, // for ROOT, TLD, DOMAIN
-    Unbound,
-    Client,
-}
-
-impl fmt::Display for Image {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let name = match self {
-            Image::Nsd => "nsd",
-            Image::Unbound => "unbound",
-            Image::Client => "client",
-        };
-        f.write_str(name)
-    }
-}
diff --git a/src/nsd.rs b/src/nsd.rs
index 4d434214..9ddedc3d 100644
--- a/src/nsd.rs
+++ b/src/nsd.rs
@@ -2,7 +2,7 @@ use std::process::Child;
 
 use minijinja::{context, Environment};
 
-use crate::{container::Container, Domain, Image, Result, CHMOD_RW_EVERYONE};
+use crate::{container::Container, Domain, Result, CHMOD_RW_EVERYONE};
 
 pub struct NsdContainer {
     child: Child,
@@ -11,7 +11,7 @@ pub struct NsdContainer {
 
 impl NsdContainer {
     pub fn start(domain: Domain) -> Result<Self> {
-        let container = Container::run(Image::Nsd)?;
+        let container = Container::run()?;
 
         container.exec(&["mkdir", "-p", "/etc/nsd/zones"])?;
         let zone_path = "/etc/nsd/zones/main.zone";
@@ -86,7 +86,7 @@ mod tests {
         let tld_ns = NsdContainer::start(Domain::Tld { domain: "com." })?;
         let ip_addr = tld_ns.ip_addr()?;
 
-        let client = Container::run(Image::Client)?;
+        let client = Container::run()?;
         let output = client.exec(&["dig", &format!("@{ip_addr}"), "SOA", "com."])?;
 
         assert!(output.status.success());
@@ -102,7 +102,7 @@ mod tests {
         let root_ns = NsdContainer::start(Domain::Root)?;
         let ip_addr = root_ns.ip_addr()?;
 
-        let client = Container::run(Image::Client)?;
+        let client = Container::run()?;
         let output = client.exec(&["dig", &format!("@{ip_addr}"), "SOA", "."])?;
 
         assert!(output.status.success());