diff --git a/enos/enos-globals.hcl b/enos/enos-globals.hcl
index 47d8fb3d8e..eca4968a9c 100644
--- a/enos/enos-globals.hcl
+++ b/enos/enos-globals.hcl
@@ -49,7 +49,7 @@ globals {
   sample_attributes = {
     aws_region            = ["us-east-1", "us-west-2"]
     distro_version_amzn2  = ["2"]
-    distro_version_leap   = ["15.4", "15.5"]
+    distro_version_leap   = ["15.5"]
     distro_version_rhel   = ["8.9", "9.3"]
     distro_version_sles   = ["v15_sp5_standard"]
     distro_version_ubuntu = ["20.04", "22.04"]
diff --git a/enos/enos-scenario-agent.hcl b/enos/enos-scenario-agent.hcl
index 8dd6699cf4..f6b865bff0 100644
--- a/enos/enos-scenario-agent.hcl
+++ b/enos/enos-scenario-agent.hcl
@@ -32,7 +32,7 @@ scenario "agent" {
       edition = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-autopilot.hcl b/enos/enos-scenario-autopilot.hcl
index 870797f286..babfe948be 100644
--- a/enos/enos-scenario-autopilot.hcl
+++ b/enos/enos-scenario-autopilot.hcl
@@ -35,7 +35,7 @@ scenario "autopilot" {
       edition = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-proxy.hcl b/enos/enos-scenario-proxy.hcl
index 0869b1cacc..5748d8788b 100644
--- a/enos/enos-scenario-proxy.hcl
+++ b/enos/enos-scenario-proxy.hcl
@@ -32,7 +32,7 @@ scenario "proxy" {
       edition = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-replication.hcl b/enos/enos-scenario-replication.hcl
index c47ce75d9f..f0e40953ad 100644
--- a/enos/enos-scenario-replication.hcl
+++ b/enos/enos-scenario-replication.hcl
@@ -42,7 +42,7 @@ scenario "replication" {
       edition        = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-seal-ha.hcl b/enos/enos-scenario-seal-ha.hcl
index 08a16aae70..8b5cca1b2f 100644
--- a/enos/enos-scenario-seal-ha.hcl
+++ b/enos/enos-scenario-seal-ha.hcl
@@ -39,7 +39,7 @@ scenario "seal_ha" {
       edition        = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-smoke.hcl b/enos/enos-scenario-smoke.hcl
index 1de5bb35ab..a9be4ab78d 100644
--- a/enos/enos-scenario-smoke.hcl
+++ b/enos/enos-scenario-smoke.hcl
@@ -32,7 +32,7 @@ scenario "smoke" {
       edition = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-scenario-upgrade.hcl b/enos/enos-scenario-upgrade.hcl
index 89d072c224..14ab3e4eb7 100644
--- a/enos/enos-scenario-upgrade.hcl
+++ b/enos/enos-scenario-upgrade.hcl
@@ -45,7 +45,7 @@ scenario "upgrade" {
       edition = ["ce", "ent", "ent.fips1402"]
     }
 
-    # arm64 AMIs are not offered for Leap 15.4
+    # arm64 AMIs are not offered for Leap
     exclude {
       distro = ["leap"]
       arch   = ["arm64"]
diff --git a/enos/enos-variables.hcl b/enos/enos-variables.hcl
index 9477e238b7..8c88235654 100644
--- a/enos/enos-variables.hcl
+++ b/enos/enos-variables.hcl
@@ -84,7 +84,7 @@ variable "distro_version_amzn2" {
 variable "distro_version_leap" {
   description = "The version of openSUSE leap to use"
   type        = string
-  default     = "15.5" // or "15.4"
+  default     = "15.5"
 }
 
 variable "distro_version_rhel" {
diff --git a/enos/enos.vars.hcl b/enos/enos.vars.hcl
index 3756659bca..fd6b9d858d 100644
--- a/enos/enos.vars.hcl
+++ b/enos/enos.vars.hcl
@@ -41,7 +41,7 @@
 # distro_version_amzn2 = "2"
 
 # distro_version_leap is the version of openSUSE Leap to use for "distro:leap" variants
-# distro_version_leap = "15.5" // or "15.4"
+# distro_version_leap = "15.5"
 
 # distro_version_rhel is the version of RHEL to use for "distro:rhel" variants.
 # distro_version_rhel = "9.3" // or "8.9"
@@ -50,7 +50,7 @@
 # distro_version_sles = "v15_sp5_standard"
 
 # distro_version_ubuntu is the version of ubuntu to use for "distro:ubuntu" variants
-# distro_version_ubuntu = "22.04" // or "20.04", "18.04"
+# distro_version_ubuntu = "22.04" // or "20.04"
 
 # tags are a map of tags that will be applied to infrastructure resources that
 # support tagging.
diff --git a/enos/modules/ec2_info/main.tf b/enos/modules/ec2_info/main.tf
index c031c68d55..cf304b0def 100644
--- a/enos/modules/ec2_info/main.tf
+++ b/enos/modules/ec2_info/main.tf
@@ -36,7 +36,6 @@ locals {
         "2" = data.aws_ami.amzn2["x86_64"].id
       }
       "leap" = {
-        "15.4" = data.aws_ami.leap_154.id
         "15.5" = data.aws_ami.leap_155.id
       }
       "rhel" = {
@@ -47,7 +46,6 @@ locals {
         "v15_sp5_standard" = data.aws_ami.sles_15_sp5_standard["x86_64"].id
       }
       "ubuntu" = {
-        "18.04" = data.aws_ami.ubuntu_1804["x86_64"].id
         "20.04" = data.aws_ami.ubuntu_2004["x86_64"].id
         "22.04" = data.aws_ami.ubuntu_2204["x86_64"].id
       }
@@ -55,28 +53,6 @@ locals {
   }
 }
 
-data "aws_ami" "ubuntu_1804" {
-  most_recent = true
-  for_each    = local.architectures
-
-  filter {
-    name   = "name"
-    values = ["ubuntu/images/hvm-ssd/ubuntu-*-18.04-*-server-*"]
-  }
-
-  filter {
-    name   = "virtualization-type"
-    values = ["hvm"]
-  }
-
-  filter {
-    name   = "architecture"
-    values = [each.value]
-  }
-
-  owners = [local.canonical_owner_id]
-}
-
 data "aws_ami" "ubuntu_2004" {
   most_recent = true
   for_each    = local.architectures
@@ -201,25 +177,6 @@ data "aws_ami" "sles_15_sp5_standard" {
   owners = [local.sles_owner_id]
 }
 
-data "aws_ami" "leap_154" {
-  most_recent = true
-
-  filter {
-    name   = "name"
-    values = ["openSUSE-Leap-15.4*"]
-  }
-
-  filter {
-    name = "architecture"
-    # Note: arm64 AMIs are offered for Leap 15.5, but not 15.4. For now we will
-    # only use x86_64 for both in order to not introduce complexity in our matrix
-    # exclusions.
-    values = ["x86_64"]
-  }
-
-  owners = [local.suse_owner_id]
-}
-
 data "aws_ami" "leap_155" {
   most_recent = true
 
@@ -230,9 +187,7 @@ data "aws_ami" "leap_155" {
 
   filter {
     name = "architecture"
-    # Note: arm64 AMIs are offered for Leap 15.5, but not 15.4. For now we will
-    # only use x86_64 for both in order to not introduce complexity in our matrix
-    # exclusions.
+    # Note: arm64 AMIs are not offered for Leap.
     values = ["x86_64"]
   }