diff --git a/packages/aws-cdk-lib/aws-eks/lib/managed-nodegroup.ts b/packages/aws-cdk-lib/aws-eks/lib/managed-nodegroup.ts
index be4bd439f727f..fe1896bd7165d 100644
--- a/packages/aws-cdk-lib/aws-eks/lib/managed-nodegroup.ts
+++ b/packages/aws-cdk-lib/aws-eks/lib/managed-nodegroup.ts
@@ -421,7 +421,7 @@ export class Nodegroup extends Resource implements INodegroup {
 
       // if the user explicitly configured an ami type, make sure it's included in the possibleAmiTypes
       if (props.amiType && !possibleAmiTypes.includes(props.amiType)) {
-        throw new Error(`The specified AMI does not match the instance types architecture, either specify one of ${possibleAmiTypes.join(', ')} or don't specify any`);
+        throw new Error(`The specified AMI does not match the instance types architecture, either specify one of ${possibleAmiTypes.join(', ').toUpperCase()} or don't specify any`);
       }
 
       //if the user explicitly configured a Windows ami type, make sure the instanceType is allowed
@@ -611,7 +611,7 @@ function getPossibleAmiTypes(instanceTypes: InstanceType[]): NodegroupAmiType[]
   const architectures: Set<AmiArchitecture> = new Set(instanceTypes.map(typeToArch));
 
   if (architectures.size === 0) { // protective code, the current implementation will never result in this.
-    throw new Error(`Cannot determine any ami type comptaible with instance types: ${instanceTypes.map(i => i.toString).join(',')}`);
+    throw new Error(`Cannot determine any ami type compatible with instance types: ${instanceTypes.map(i => i.toString).join(', ')}`);
   }
 
   if (architectures.size > 1) {
diff --git a/packages/aws-cdk-lib/aws-eks/test/nodegroup.test.ts b/packages/aws-cdk-lib/aws-eks/test/nodegroup.test.ts
index 51a58b6ab2e73..32871fb042780 100644
--- a/packages/aws-cdk-lib/aws-eks/test/nodegroup.test.ts
+++ b/packages/aws-cdk-lib/aws-eks/test/nodegroup.test.ts
@@ -558,7 +558,7 @@ describe('node group', () => {
         new ec2.InstanceType('p3.large'),
         new ec2.InstanceType('g3.large'),
       ],
-    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_x86_64_GPU, BOTTLEROCKET_x86_64_NVIDIA, BOTTLEROCKET_ARM_64_NVIDIA or don't specify any/);
+    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_X86_64_GPU, BOTTLEROCKET_X86_64_NVIDIA, BOTTLEROCKET_ARM_64_NVIDIA or don't specify any/);
   });
 
   /**
@@ -580,7 +580,7 @@ describe('node group', () => {
         new ec2.InstanceType('c5.large'),
         new ec2.InstanceType('m5.large'),
       ],
-    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_x86_64, BOTTLEROCKET_x86_64, WINDOWS_CORE_2019_x86_64, WINDOWS_CORE_2022_x86_64, WINDOWS_FULL_2019_x86_64, WINDOWS_FULL_2022_x86_64 or don't specify any/);
+    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_X86_64, BOTTLEROCKET_X86_64, WINDOWS_CORE_2019_X86_64, WINDOWS_CORE_2022_X86_64, WINDOWS_FULL_2019_X86_64, WINDOWS_FULL_2022_X86_64 or don't specify any/);
   });
 
   test('throws when AmiType is Windows and forbidden instanceType is selected', () => {
@@ -619,7 +619,7 @@ describe('node group', () => {
         new ec2.InstanceType('c5.large'),
         new ec2.InstanceType('m5.large'),
       ],
-    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_x86_64, BOTTLEROCKET_x86_64, WINDOWS_CORE_2019_x86_64, WINDOWS_CORE_2022_x86_64, WINDOWS_FULL_2019_x86_64, WINDOWS_FULL_2022_x86_64 or don't specify any/);
+    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_X86_64, BOTTLEROCKET_X86_64, WINDOWS_CORE_2019_X86_64, WINDOWS_CORE_2022_X86_64, WINDOWS_FULL_2019_X86_64, WINDOWS_FULL_2022_X86_64 or don't specify any/);
   });
 
   test('throws when LaunchTemplate is undefined, amiType is BOTTLEROCKET_ARM_64_NVIDIA and instanceTypes are not GPU', () => {
@@ -637,7 +637,7 @@ describe('node group', () => {
         new ec2.InstanceType('c5.large'),
         new ec2.InstanceType('m5.large'),
       ],
-    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_x86_64, BOTTLEROCKET_x86_64, WINDOWS_CORE_2019_x86_64, WINDOWS_CORE_2022_x86_64, WINDOWS_FULL_2019_x86_64, WINDOWS_FULL_2022_x86_64 or don't specify any/);
+    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_X86_64, BOTTLEROCKET_X86_64, WINDOWS_CORE_2019_X86_64, WINDOWS_CORE_2022_X86_64, WINDOWS_FULL_2019_X86_64, WINDOWS_FULL_2022_X86_64 or don't specify any/);
   });
 
   test('throws when LaunchTemplate is undefined, amiType is BOTTLEROCKET_X86_64_NVIDIA and instanceTypes are not GPU', () => {
@@ -655,7 +655,7 @@ describe('node group', () => {
         new ec2.InstanceType('c5.large'),
         new ec2.InstanceType('m5.large'),
       ],
-    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_x86_64, BOTTLEROCKET_x86_64, WINDOWS_CORE_2019_x86_64, WINDOWS_CORE_2022_x86_64, WINDOWS_FULL_2019_x86_64, WINDOWS_FULL_2022_x86_64 or don't specify any/);
+    })).toThrow(/The specified AMI does not match the instance types architecture, either specify one of AL2_X86_64, BOTTLEROCKET_X86_64, WINDOWS_CORE_2019_X86_64, WINDOWS_CORE_2022_X86_64, WINDOWS_FULL_2019_X86_64, WINDOWS_FULL_2022_X86_64 or don't specify any/);
   });
 
   /**