diff --git a/network/src/main/java/org/openjdk/skara/network/RestRequestCache.java b/network/src/main/java/org/openjdk/skara/network/RestRequestCache.java
index 60ec22fb5..4940a8a27 100644
--- a/network/src/main/java/org/openjdk/skara/network/RestRequestCache.java
+++ b/network/src/main/java/org/openjdk/skara/network/RestRequestCache.java
@@ -217,6 +217,14 @@ HttpResponse<String> send(String authId, HttpRequest.Builder requestBuilder) thr
             }
             try (var ignored = new LockWithTimeout(authLock)) {
                 return client.send(finalRequest, HttpResponse.BodyHandlers.ofString());
+            } finally {
+                // Invalidate any related GET caches
+                var postUriString = unauthenticatedRequest.uri().toString();
+                for (var cachedResponse : cachedResponses.keySet()) {
+                    if (cachedResponse.unauthenticatedRequest.uri().toString().startsWith(postUriString)) {
+                        cachedUpdated.put(cachedResponse, Instant.now().minus(Duration.ofDays(1)));
+                    }
+                }
             }
         }
     }
diff --git a/network/src/test/java/org/openjdk/skara/network/RestRequestTests.java b/network/src/test/java/org/openjdk/skara/network/RestRequestTests.java
index 77e5a4cc0..f76f23231 100644
--- a/network/src/test/java/org/openjdk/skara/network/RestRequestTests.java
+++ b/network/src/test/java/org/openjdk/skara/network/RestRequestTests.java
@@ -268,6 +268,38 @@ void cached() throws IOException {
         }
     }
 
+    @Test
+    void cacheFlush() throws IOException {
+        try (var receiver = new RestReceiver()) {
+            var request = new RestRequest(receiver.getEndpoint());
+            request.get("/test").execute();
+            assertFalse(receiver.usedCached());
+            request.post("/test").execute();
+            request.get("/test").execute();
+            assertFalse(receiver.usedCached());
+            var anotherRequest = new RestRequest(receiver.getEndpoint());
+            request.post("/test").execute();
+            anotherRequest.get("/test").execute();
+            assertFalse(receiver.usedCached());
+        }
+    }
+
+    @Test
+    void cacheFlushPartial() throws IOException {
+        try (var receiver = new RestReceiver()) {
+            var request = new RestRequest(receiver.getEndpoint());
+            request.get("/test?1").execute();
+            assertFalse(receiver.usedCached());
+            request.get("/test?1").execute();
+            assertTrue(receiver.usedCached());
+            request.post("/test").execute();
+            request.get("/test?1").execute();
+            assertFalse(receiver.usedCached());
+            request.get("/test?1").execute();
+            assertTrue(receiver.usedCached());
+        }
+    }
+
     @Test
     void cachedSeparateAuth() throws IOException {
         try (var receiver = new RestReceiver()) {