diff --git a/src/test/tree/images/NormalizedImageNameInfo.test.ts b/src/test/tree/images/NormalizedImageNameInfo.test.ts
new file mode 100644
index 0000000000..1a192d3e34
--- /dev/null
+++ b/src/test/tree/images/NormalizedImageNameInfo.test.ts
@@ -0,0 +1,178 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See LICENSE.md in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import assert = require('assert');
+import { ImageNameInfo } from '../../../runtimes/docker';
+import { NormalizedImageNameInfo } from '../../../tree/images/NormalizedImageNameInfo';
+
+// The expected values for each of these test cases are in the methods below
+// The order of the test cases must exactly match the order of the expected values
+const testCases: ImageNameInfo[] = [
+    {
+        originalName: 'alpine',
+        registry: undefined,
+        image: 'alpine',
+        tag: 'latest',
+    },
+    {
+        originalName: 'myapp',
+        registry: undefined,
+        image: 'myapp',
+        tag: 'latest',
+    },
+    {
+        originalName: 'mynamespace/myapp',
+        registry: undefined,
+        image: 'mynamespace/myapp',
+        tag: '1.0',
+    },
+    {
+        originalName: 'mcr.microsoft.com/dotnet/runtime',
+        registry: 'mcr.microsoft.com',
+        image: 'dotnet/runtime',
+        tag: 'latest',
+    },
+    {
+        originalName: 'myregistry.contoso.com/someapp:5.0',
+        registry: 'myregistry.contoso.com',
+        image: 'someapp',
+        tag: '5.0',
+    },
+    {
+        originalName: 'myregistry.contoso.com/with/longer/namespace/someapp:5.0',
+        registry: 'myregistry.contoso.com',
+        image: 'with/longer/namespace/someapp',
+        tag: '5.0',
+    },
+    {
+        originalName: '<none>',
+        registry: undefined,
+        image: undefined,
+        tag: undefined,
+    },
+    {
+        originalName: 'alpine',
+        registry: undefined,
+        image: 'alpine',
+        tag: undefined,
+    }
+];
+
+suite('(unit) NormalizedImageNameInfo Tests', () => {
+
+    suite(('normalizedImageName'), () => {
+        const expected = [
+            'alpine',
+            'myapp',
+            'mynamespace/myapp',
+            'dotnet/runtime',
+            'someapp',
+            'with/longer/namespace/someapp',
+            '<none>',
+            'alpine',
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedImageName', expected);
+    });
+
+    suite(('normalizedTag'), () => {
+        const expected = [
+            'latest',
+            'latest',
+            '1.0',
+            'latest',
+            '5.0',
+            '5.0',
+            '<none>',
+            '<none>',
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedTag', expected);
+    });
+
+    suite(('normalizedImageNameAndTag'), () => {
+        const expected = [
+            'alpine:latest',
+            'myapp:latest',
+            'mynamespace/myapp:1.0',
+            'dotnet/runtime:latest',
+            'someapp:5.0',
+            'with/longer/namespace/someapp:5.0',
+            '<none>',
+            'alpine',
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedImageNameAndTag', expected);
+    });
+
+    suite(('fullTag'), () => {
+        const expected = [
+            'alpine:latest',
+            'myapp:latest',
+            'mynamespace/myapp:1.0',
+            'mcr.microsoft.com/dotnet/runtime:latest',
+            'myregistry.contoso.com/someapp:5.0',
+            'myregistry.contoso.com/with/longer/namespace/someapp:5.0',
+            '<none>',
+            'alpine',
+        ];
+
+        testPropertyAgainstExpectedValues('fullTag', expected);
+    });
+
+    suite(('normalizedNamespace'), () => {
+        const expected = [
+            'library',
+            'library',
+            'mynamespace',
+            'dotnet',
+            undefined,
+            'with/longer/namespace',
+            'library',
+            'library'
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedNamespace', expected);
+    });
+
+    suite(('normalizedRegistry'), () => {
+        const expected = [
+            'docker.io',
+            'docker.io',
+            'docker.io',
+            'mcr.microsoft.com',
+            'myregistry.contoso.com',
+            'myregistry.contoso.com',
+            'docker.io',
+            'docker.io',
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedRegistry', expected);
+    });
+
+    suite(('normalizedRegistryAndImageName'), () => {
+        const expected = [
+            'alpine',
+            'myapp',
+            'docker.io/mynamespace/myapp',
+            'mcr.microsoft.com/dotnet/runtime',
+            'myregistry.contoso.com/someapp',
+            'myregistry.contoso.com/with/longer/namespace/someapp',
+            '<none>',
+            'alpine',
+        ];
+
+        testPropertyAgainstExpectedValues('normalizedRegistryAndImageName', expected);
+    });
+});
+
+function testPropertyAgainstExpectedValues(property: string, expected: string[]): void {
+    testCases.forEach((testCase, index) => {
+        test(testCase.originalName, () => {
+            const normalizedImageNameInfo = new NormalizedImageNameInfo(testCase);
+            assert.strictEqual(normalizedImageNameInfo[property], expected[index]);
+        });
+    });
+}
diff --git a/src/tree/images/NormalizedImageNameInfo.ts b/src/tree/images/NormalizedImageNameInfo.ts
index 6c3bb876a9..450ebae1db 100644
--- a/src/tree/images/NormalizedImageNameInfo.ts
+++ b/src/tree/images/NormalizedImageNameInfo.ts
@@ -49,15 +49,18 @@ export class NormalizedImageNameInfo {
     }
 
     /**
-     * The part of the image name before the first '/' (if image name is truthy and contains '/'), otherwise 'library' (i.e. the 'library' in 'docker.io/library')
+     * The part of the image name before the last '/' (if image name is truthy and contains '/'), otherwise 'library' if the
+     * normalized registry is 'docker.io', otherwise undefined
      */
-    public get normalizedNamespace(): string {
+    public get normalizedNamespace(): string | undefined {
         let i: number;
-        if ((i = this.normalizedImageName.indexOf('/')) >= 0) {
+        if ((i = this.normalizedImageName.lastIndexOf('/')) >= 0) {
             return this.normalizedImageName.substring(0, i);
+        } else if (this.normalizedRegistry === 'docker.io') {
+            return 'library';
+        } else {
+            return undefined;
         }
-
-        return 'library';
     }
 
     /**
@@ -71,6 +74,14 @@ export class NormalizedImageNameInfo {
      * Normalized registry + normalized image name
      */
     public get normalizedRegistryAndImageName(): string {
-        return `${this.normalizedRegistry}/${this.normalizedImageName}`;
+        // If the registry is explicitly or implicitly `docker.io`, and the namespace is explicitly or implicitly `library`,
+        // then we don't show either of those parts as the image name--that most closely matches the Docker CLI's default
+        // display behavior. As a slight but intentional deviation from that behavior, if an image is namespaced, we'll
+        // include the implicit `docker.io`.
+        if (this.normalizedRegistry === 'docker.io' && this.normalizedNamespace === 'library') {
+            return this.normalizedImageName;
+        } else {
+            return `${this.normalizedRegistry}/${this.normalizedImageName}`;
+        }
     }
 }