diff --git a/README.md b/README.md
index 257e2ba..a204d14 100644
--- a/README.md
+++ b/README.md
@@ -115,12 +115,12 @@ This method returns a teardown function.
 
 ```ts
 function show(
-  partialLogger?: PartialLogger = console
+  partialLogger: PartialLogger = console
 ): void
 
 function show(
   match: string | RegExp | MatchPredicate | Observable<any>,
-  partialLogger?: PartialLogger = console
+  partialLogger: PartialLogger = console
 ): void
 ```
 
@@ -133,13 +133,17 @@ The logged information is retrieved from the most recent snapshot, so if snapsho
 ### log
 
 ```ts
+function log(
+  partialLogger: PartialLogger = console
+): () => void
+
 function log(
   match: string | RegExp | MatchPredicate | Observable<any>,
   partialLogger: PartialLogger = console
 ): () => void
 ```
 
-Wires up an instance of the log plugin for matching observables.
+Wires up an instance of the log plugin for matching observables. If no `match` is specified, all tagged observables will be logged.
 
 All `subscribe`, `next`, `complete`, `error` and `unsubscribe` events will be logged to the console or to the specified logger.
 
diff --git a/source/spy-spec.ts b/source/spy-spec.ts
index bb52ea7..be3e095 100644
--- a/source/spy-spec.ts
+++ b/source/spy-spec.ts
@@ -69,6 +69,23 @@ describe("spy", () => {
             expect(calls).to.not.be.empty;
             expect(calls[0]).to.deep.equal(["Tag = people; event = unsubscribe"]);
         });
+
+        it("should log all/any tagged observables", () => {
+
+            teardown = spy({ plugins: [] });
+
+            const subject = new Subject<string>();
+            const calls: any[][] = [];
+
+            log({
+                log(...args: any[]): void { calls.push(args); }
+            });
+
+            const subscription = subject.tag("people").subscribe();
+            expect(calls).to.not.be.empty;
+            expect(calls[0]).to.deep.equal(["Tag = people; event = subscribe"]);
+            expect(calls[1]).to.deep.equal(["  Matching", "/.+/"]);
+        });
     });
 
     describe("patch", () => {
diff --git a/source/spy.ts b/source/spy.ts
index 17b1402..099e046 100644
--- a/source/spy.ts
+++ b/source/spy.ts
@@ -128,7 +128,17 @@ export function flush(): void {
     plugins_.forEach((plugin) => plugin.flush());
 }
 
-export function log(match: Match, partialLogger?: PartialLogger): () => void {
+export function log(partialLogger?: PartialLogger): () => void;
+export function log(match: Match, partialLogger?: PartialLogger): () => void;
+export function log(match: any, partialLogger?: PartialLogger): () => void {
+
+    const anyTagged = /.+/;
+    if (!match) {
+        match = anyTagged;
+    } else if (typeof match.log === "function") {
+        partialLogger = match;
+        match = anyTagged;
+    }
 
     return plugin(new LogPlugin(match, partialLogger), `log(${matchToString(match)})`);
 }