diff --git a/CHANGES.md b/CHANGES.md
index 50d596e40..5ed3c124a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,7 @@
 
 ## 5.0.6
 
+* IIIF information endpoints return JSON in HTTP 401 responses.
 * Fixed a bug whereby the values of the `operations` and `page_count` keys
   in the delegate context were not set.
 * TurboJpegProcessor is able to generate non-JPEG derivative images, which
diff --git a/src/main/java/edu/illinois/library/cantaloupe/resource/AbstractResource.java b/src/main/java/edu/illinois/library/cantaloupe/resource/AbstractResource.java
index 20181b298..364f94e96 100644
--- a/src/main/java/edu/illinois/library/cantaloupe/resource/AbstractResource.java
+++ b/src/main/java/edu/illinois/library/cantaloupe/resource/AbstractResource.java
@@ -364,6 +364,9 @@ private boolean processAuthInfo(AuthInfo info)
             if (code == 401) {
                 getResponse().setHeader("WWW-Authenticate",
                         info.getChallengeValue());
+                if (getRequestContext().getLocalURI().getPath().endsWith("info.json")) {
+                    return true;
+                }
             }
             throw new ResourceException(new Status(code));
         }
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/ImageAPIResourceTester.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/ImageAPIResourceTester.java
index ef04a9365..236d17ced 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/ImageAPIResourceTester.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/ImageAPIResourceTester.java
@@ -51,7 +51,7 @@ public void testAuthorizationWhenAuthorized(URI uri) {
         assertStatus(200, uri);
     }
 
-    public void testAuthorizationWhenUnauthorized(URI uri) {
+    public void testAuthorizationWhenUnauthorized(URI uri, String endpointPath) {
         // This may vary depending on the return value of a delegate method,
         // but the way the tests are set up, it's 401.
         assertStatus(401, uri);
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/InformationResourceTester.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/InformationResourceTester.java
index 9d3928dcf..effdd5ca7 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/InformationResourceTester.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/InformationResourceTester.java
@@ -10,6 +10,7 @@
 import edu.illinois.library.cantaloupe.http.Response;
 import edu.illinois.library.cantaloupe.image.Identifier;
 import edu.illinois.library.cantaloupe.resource.AbstractResource;
+import edu.illinois.library.cantaloupe.resource.Route;
 import edu.illinois.library.cantaloupe.test.TestUtil;
 
 import java.io.File;
@@ -27,6 +28,20 @@
  */
 public class InformationResourceTester extends ImageAPIResourceTester {
 
+    @Override
+    public void testAuthorizationWhenUnauthorized(URI uri, String endpointPath) {
+        final String requiredJsonLdContent;
+
+        if (endpointPath.equals(Route.IIIF_1_PATH)) {
+            requiredJsonLdContent = "\"@context\":\"http://library.stanford.edu/iiif/image-api/1.1/context.json\"";
+        } else {
+            requiredJsonLdContent = "\"protocol\":\"http://iiif.io/api/image\"";
+        }
+
+        assertStatus(401, uri);
+        assertRepresentationContains(requiredJsonLdContent, uri);
+    }
+
     public void testCacheWithDerivativeCacheEnabledAndInfoCacheEnabledAndResolveFirstEnabled(
             URI uri, Path sourceFile) throws Exception {
         final Path cacheDir = initializeFilesystemCache();
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/ImageResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/ImageResourceTest.java
index 40eb7924d..aa7f7b100 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/ImageResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/ImageResourceTest.java
@@ -47,7 +47,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/full/full/0/color.jpg");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/InformationResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/InformationResourceTest.java
index a37df660a..d6675a2f9 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/InformationResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v1/InformationResourceTest.java
@@ -51,7 +51,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/info.json");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/ImageResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/ImageResourceTest.java
index d2f6008ea..0478df5a2 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/ImageResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/ImageResourceTest.java
@@ -47,7 +47,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/full/full/0/color.jpg");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/InformationResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/InformationResourceTest.java
index c8f879830..8a922528e 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/InformationResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v2/InformationResourceTest.java
@@ -51,7 +51,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/info.json");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/ImageResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/ImageResourceTest.java
index 2b834f61b..551ae202d 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/ImageResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/ImageResourceTest.java
@@ -45,7 +45,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/full/max/0/color.jpg");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test
diff --git a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/InformationResourceTest.java b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/InformationResourceTest.java
index e3bfc5d53..4194922ba 100644
--- a/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/InformationResourceTest.java
+++ b/src/test/java/edu/illinois/library/cantaloupe/resource/iiif/v3/InformationResourceTest.java
@@ -51,7 +51,7 @@ void testGETAuthorizationWhenAuthorized() {
     @Test
     void testGETAuthorizationWhenUnauthorized() {
         URI uri = getHTTPURI("/unauthorized.jpg/info.json");
-        tester.testAuthorizationWhenUnauthorized(uri);
+        tester.testAuthorizationWhenUnauthorized(uri, getEndpointPath());
     }
 
     @Test