diff --git a/README.md b/README.md
index 9e56111b..fcfe705d 100644
--- a/README.md
+++ b/README.md
@@ -313,7 +313,7 @@ The general format for the file is highlighted below.
 
 ```yaml
 registryConfigs:
-  - pattern: <registry_matching_pattern>
+  - registry: <registry_matching_pattern>
     config:
       profile: "<AWS_PROFILE_NAME>"
 ```
@@ -322,13 +322,13 @@ For example:
 
 ```yaml
 registryConfigs:
-  - pattern: "123456789000.dkr.ecr.ap-southeast-2.amazonaws.com"
+  - registry: "123456789000.dkr.ecr.ap-southeast-2.amazonaws.com"
     config:
       profile: "some_profile"
-  - pattern: "987654321000.us-east-1.amazonaws.com"
+  - registry: "987654321000.us-east-1.amazonaws.com"
     config:
       profile: "another_profile"
-  - pattern: "*.us-east-1.amazonaws.com"
+  - registry: "*.us-east-1.amazonaws.com"
     config:
       profile: "fallback_profile"
 ```
diff --git a/ecr-login/config/registry/registry.go b/ecr-login/config/registry/registry.go
index 2dfb6533..d7f16822 100644
--- a/ecr-login/config/registry/registry.go
+++ b/ecr-login/config/registry/registry.go
@@ -15,7 +15,7 @@ type RegistryConfig struct {
 }
 
 type RegistryConfigEntry struct {
-    Pattern string         `yaml:"pattern"`
+    Registry string        `yaml:"registry"`
     Config  RegistryConfig `yaml:"config"`
 }
 
@@ -31,7 +31,7 @@ var (
     GetRegistryProfile = getRegistryProfile // Provide override for mocking
 )
 
-// Helper to match registry with wildard patterns
+// Helper to match registry with wildcard prefix and suffix patterns
 func matchesPattern(pattern, registry string) bool {
     if pattern == "*" {
         return true
@@ -45,7 +45,7 @@ func matchesPattern(pattern, registry string) bool {
     return pattern == registry // Exact match
 }
 
-// Function to determine the RegistryConfigPath
+// Function to get the RegistryConfigPath
 func getRegistryConfigPath() string {
 	// Get the path from the environment variable
     if configPath := os.Getenv(ENV_AWS_ECR_REGISTRY_CONFIG_PATH); configPath != "" {
@@ -80,7 +80,7 @@ func getRegistryConfig(registry string) (*RegistryConfig, error) {
 
     // Look for the registry configuration with wildcards support in file order
     for _, entry := range configs.RegistryConfigs {
-        if matchesPattern(entry.Pattern, registry) {
+        if matchesPattern(entry.Registry, registry) {
             return &entry.Config, nil
         }
     }
@@ -88,8 +88,8 @@ func getRegistryConfig(registry string) (*RegistryConfig, error) {
     return nil, nil // Return nil if registry is not found
 }
 
-// GetRegistryProfile attempts to retrieve a profile from the RegistryConfig for the specified registry.
-// Returns a the profile string if found, or nil if not found.
+// GetRegistryProfile attempts to retrieve a profile from the RegistryConfig for the specified registry pattern.
+// Returns the profile string if found, or empty string if not found.
 func getRegistryProfile(registry string) (string, error) {
     config, err := getRegistryConfig(registry)
     if err != nil {
diff --git a/ecr-login/config/registry/registry_builder.go b/ecr-login/config/registry/registry_builder.go
index ef362e69..aa883cb0 100644
--- a/ecr-login/config/registry/registry_builder.go
+++ b/ecr-login/config/registry/registry_builder.go
@@ -15,9 +15,9 @@ func NewRegistryConfigBuilder() *RegistryConfigBuilder {
 }
 
 // Adds a new registry configuration with the given name and credential.
-func (b *RegistryConfigBuilder) AddRegistryConfigWithProfile(pattern string, profile string) *RegistryConfigBuilder {
+func (b *RegistryConfigBuilder) AddRegistryConfigWithProfile(registry string, profile string) *RegistryConfigBuilder {
     entry := RegistryConfigEntry{
-        Pattern: pattern,
+        Registry: registry,
         Config:  RegistryConfig{Profile: profile},
     }
     b.config.RegistryConfigs = append(b.config.RegistryConfigs, entry) // Append to the slice
diff --git a/ecr-login/config/registry/registry_test.go b/ecr-login/config/registry/registry_test.go
index e7ddf9d4..622070fd 100644
--- a/ecr-login/config/registry/registry_test.go
+++ b/ecr-login/config/registry/registry_test.go
@@ -180,14 +180,12 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
         registryPattern string
         registryConfigs *RegistryConfigs
         expectedProfile string
-        expectedError   bool
     }{
         {
             name: "No config",
             registryPattern: "123456789000.dkr.ecr.ap-southeast-2.amazonaws.com",
             registryConfigs: nil,
             expectedProfile: "",
-            expectedError: false,
         },
         {
             name: "Exact match",
@@ -196,7 +194,6 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("123456789000.dkr.ecr.ap-southeast-2.amazonaws.com", "production").
                 Build(),
             expectedProfile: "production",
-            expectedError: false,
         },
         {
             name: "No match",
@@ -205,7 +202,23 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("987654321000.dkr.ecr.ap-southeast-2.amazonaws.com", "production").
                 Build(),
             expectedProfile: "",
-            expectedError: false,
+        },
+        {
+            name: "Duplicate match use first match",
+            registryPattern: "987654321000.us-east-1.amazonaws.com",
+            registryConfigs: NewRegistryConfigBuilder().
+                AddRegistryConfigWithProfile("987654321000.us-east-1.amazonaws.com", "production").
+                AddRegistryConfigWithProfile("987654321000.us-east-1.amazonaws.com", "other_profile").
+                Build(),
+            expectedProfile: "production",
+        },
+        {
+            name: "Unsupported complex wildcard, no match",
+            registryPattern: "123456789000.dkr.ecr.ap-southeast-2.amazonaws.com",
+            registryConfigs: NewRegistryConfigBuilder().
+                AddRegistryConfigWithProfile("*.dkr.ecr.*.amazonaws.com", "production").
+                Build(),
+            expectedProfile: "",
         },
         {
             name: "Wildcard prefix single match",
@@ -214,7 +227,6 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("*.dkr.ecr.ap-southeast-2.amazonaws.com", "production").
                 Build(),
             expectedProfile: "production",
-            expectedError: false,
         },
         {
             name: "Wildcard prefix first match",
@@ -224,7 +236,6 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("123456789000.dkr.ecr.ap-southeast-2.amazonaws.com", "some_other_profile").
                 Build(),
             expectedProfile: "production",
-            expectedError: false,
         },
         {
             name: "Wildcard suffix single match",
@@ -233,7 +244,6 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("123456789000.*", "production").
                 Build(),
             expectedProfile: "production",
-            expectedError: false,
         },
         {
             name: "Wildcard suffix first match",
@@ -244,7 +254,6 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("*.dkr.ecr.ap-southeast-2.amazonaws.com", "yet_another_profile").
                 Build(),
             expectedProfile: "production",
-            expectedError: false,
         },
         {
             name: "Wildcard fallback match",
@@ -254,8 +263,7 @@ func TestGetRegistryProfileWildcards(t *testing.T) {
                 AddRegistryConfigWithProfile("*.us-east-1.amazonaws.com", "fallback_profile").
                 Build(),
             expectedProfile: "fallback_profile",
-            expectedError: false,
-        },    
+        },
     }
 
     for _, tc := range testCases {