diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8333977..df64be2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Streams are marked as finished when `ovni_thread_free()` is called. A warning
   is emitted in the emulator for those streams that are not finished properly.
 - List the emulation models and versions with `ovniemu -h`
+- New `-a` ovniemu option to enable all models
 
 ### Changed
 
diff --git a/src/emu/emu_args.c b/src/emu/emu_args.c
index daecbe9..21fafe5 100644
--- a/src/emu/emu_args.c
+++ b/src/emu/emu_args.c
@@ -19,13 +19,15 @@ usage(void)
 {
 	rerr("%s -- version %s\n", progname, version);
 	rerr("\n");
-	rerr("Usage: %s [-c offsetfile] [-bdlh] tracedir\n", progname);
+	rerr("Usage: %s [-c offsetfile] [-abdlh] tracedir\n", progname);
 	rerr("\n");
 	rerr("Options:\n");
 	rerr("  -c offsetfile      Use the given offset file to correct\n");
 	rerr("                     the clocks among nodes. It can be\n");
 	rerr("                     generated by the ovnisync program\n");
 	rerr("\n");
+	rerr("  -a                 Enable all models (experimental)\n");
+	rerr("\n");
 	rerr("  -b                 Enable breakdown model (experimental)\n");
 	rerr("\n");
 	rerr("  -d                 Enable debug output (very verbose)\n");
@@ -51,7 +53,7 @@ emu_args_init(struct emu_args *args, int argc, char *argv[])
 	memset(args, 0, sizeof(struct emu_args));
 
 	int opt;
-	while ((opt = getopt(argc, argv, "bdc:lh")) != -1) {
+	while ((opt = getopt(argc, argv, "abdc:lh")) != -1) {
 		switch (opt) {
 			case 'c':
 				args->clock_offset_file = optarg;
@@ -59,6 +61,9 @@ emu_args_init(struct emu_args *args, int argc, char *argv[])
 			case 'l':
 				args->linter_mode = 1;
 				break;
+			case 'a':
+				args->enable_all_models = 1;
+				break;
 			case 'b':
 				args->breakdown = 1;
 				break;
diff --git a/src/emu/emu_args.h b/src/emu/emu_args.h
index f2267d6..87b43d5 100644
--- a/src/emu/emu_args.h
+++ b/src/emu/emu_args.h
@@ -7,6 +7,7 @@
 struct emu_args {
 	int linter_mode;
 	int breakdown;
+	int enable_all_models;
 	char *clock_offset_file;
 	char *tracedir;
 };
diff --git a/src/emu/model.c b/src/emu/model.c
index cbff52c..7e053d3 100644
--- a/src/emu/model.c
+++ b/src/emu/model.c
@@ -6,6 +6,7 @@
 #include "common.h"
 #include "version.h"
 #include "emu.h"
+#include "emu_args.h"
 #include "thread.h"
 #include "proc.h"
 
@@ -61,7 +62,7 @@ model_probe(struct model *model, struct emu *emu)
 		}
 
 		/* Zero is disabled */
-		if (ret > 0) {
+		if (ret > 0 || emu->args.enable_all_models) {
 			model->enabled[i] = 1;
 			nenabled++;
 		}
@@ -70,7 +71,10 @@ model_probe(struct model *model, struct emu *emu)
 	if (nenabled == 0) {
 		warn("no models enabled");
 	} else {
-		info("the following %d models are enabled: ", nenabled);
+		if (emu->args.enable_all_models)
+			info("all %d models are enabled (-a): ", nenabled);
+		else
+			info("the following %d models are enabled: ", nenabled);
 		for (int i = 0; i < MAX_MODELS; i++) {
 			if (!model->enabled[i])
 				continue;
diff --git a/test/emu/nosv/CMakeLists.txt b/test/emu/nosv/CMakeLists.txt
index 4e39fca..f65bb8b 100644
--- a/test/emu/nosv/CMakeLists.txt
+++ b/test/emu/nosv/CMakeLists.txt
@@ -13,3 +13,7 @@ test_emu(task-pause-from-submit.c)
 test_emu(same-subsystem.c)
 test_emu(require-missing.c SHOULD_FAIL
   REGEX "model nosv not enabled for event")
+test_emu(require-missing.c
+  NAME flag-enable-all
+  DRIVER "flag-enable-all.driver.sh"
+  REGEX "all .* models are enabled")
diff --git a/test/emu/nosv/flag-enable-all.driver.sh b/test/emu/nosv/flag-enable-all.driver.sh
new file mode 100644
index 0000000..4067238
--- /dev/null
+++ b/test/emu/nosv/flag-enable-all.driver.sh
@@ -0,0 +1,4 @@
+# Test the -a flag with a program that doesn't enable the required models for
+# the events in the stream.
+$OVNI_TEST_BIN
+ovniemu -a ovni