diff --git a/lib/iolog/regress/fuzz/fuzz_iolog_json.c b/lib/iolog/regress/fuzz/fuzz_iolog_json.c
index 77b92ad27..1ea3536a7 100644
--- a/lib/iolog/regress/fuzz/fuzz_iolog_json.c
+++ b/lib/iolog/regress/fuzz/fuzz_iolog_json.c
@@ -95,7 +95,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     FILE *fp;
 
     setprogname("fuzz_iolog_json");
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     fp = open_data(data, size);
     if (fp == NULL)
diff --git a/lib/iolog/regress/fuzz/fuzz_iolog_legacy.c b/lib/iolog/regress/fuzz/fuzz_iolog_legacy.c
index c63b036dd..d2ced37bd 100644
--- a/lib/iolog/regress/fuzz/fuzz_iolog_legacy.c
+++ b/lib/iolog/regress/fuzz/fuzz_iolog_legacy.c
@@ -93,7 +93,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     FILE *fp;
 
     setprogname("fuzz_iolog_legacy");
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     fp = open_data(data, size);
     if (fp == NULL)
diff --git a/lib/iolog/regress/fuzz/fuzz_iolog_timing.c b/lib/iolog/regress/fuzz/fuzz_iolog_timing.c
index cd520709e..785f3839f 100644
--- a/lib/iolog/regress/fuzz/fuzz_iolog_timing.c
+++ b/lib/iolog/regress/fuzz/fuzz_iolog_timing.c
@@ -76,7 +76,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     int dfd = -1, fd = -1;
 
     setprogname("fuzz_iolog_timing");
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* I/O logs consist of multiple files in a directory. */
     if (mkdtemp(logdir) == NULL)
diff --git a/lib/util/regress/fuzz/fuzz_sudo_conf.c b/lib/util/regress/fuzz/fuzz_sudo_conf.c
index 96e8015d0..127f7459d 100644
--- a/lib/util/regress/fuzz/fuzz_sudo_conf.c
+++ b/lib/util/regress/fuzz/fuzz_sudo_conf.c
@@ -67,7 +67,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     int fd;
 
     setprogname("fuzz_sudo_conf");
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* sudo_conf_read() uses a conf file path, not an open file. */
     fd = mkstemp(tempfile);
diff --git a/logsrvd/regress/fuzz/fuzz_logsrvd_conf.c b/logsrvd/regress/fuzz/fuzz_logsrvd_conf.c
index 5d724fb7f..a7956bf4a 100644
--- a/logsrvd/regress/fuzz/fuzz_logsrvd_conf.c
+++ b/logsrvd/regress/fuzz/fuzz_logsrvd_conf.c
@@ -76,7 +76,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
     int fd;
 
     setprogname("fuzz_logsrvd_conf");
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* logsrvd_conf_read() uses a conf file path, not an open file. */
     fd = mkstemp(tempfile);
diff --git a/plugins/sudoers/regress/fuzz/fuzz_policy.c b/plugins/sudoers/regress/fuzz/fuzz_policy.c
index 1cc934aee..047b81597 100644
--- a/plugins/sudoers/regress/fuzz/fuzz_policy.c
+++ b/plugins/sudoers/regress/fuzz/fuzz_policy.c
@@ -264,7 +264,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 
     setprogname("fuzz_policy");
     sudoers_debug_register(getprogname(), NULL);
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* user_info and settings must be non-NULL (even if empty). */
     push(&user_info, NULL);
diff --git a/plugins/sudoers/regress/fuzz/fuzz_sudoers.c b/plugins/sudoers/regress/fuzz/fuzz_sudoers.c
index b591f3339..336b0c08f 100644
--- a/plugins/sudoers/regress/fuzz/fuzz_sudoers.c
+++ b/plugins/sudoers/regress/fuzz/fuzz_sudoers.c
@@ -188,7 +188,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 
     setprogname("fuzz_sudoers");
     sudoers_debug_register(getprogname(), NULL);
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* Sudoers locale setup. */
     sudoers_initlocale(setlocale(LC_ALL, ""), "C");
diff --git a/plugins/sudoers/regress/fuzz/fuzz_sudoers_ldif.c b/plugins/sudoers/regress/fuzz/fuzz_sudoers_ldif.c
index d21279c20..e1f47399b 100644
--- a/plugins/sudoers/regress/fuzz/fuzz_sudoers_ldif.c
+++ b/plugins/sudoers/regress/fuzz/fuzz_sudoers_ldif.c
@@ -133,7 +133,8 @@ LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 
     setprogname("fuzz_sudoers_ldif");
     sudoers_debug_register(getprogname(), NULL);
-    sudo_warn_set_conversation(fuzz_conversation);
+    if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+	sudo_warn_set_conversation(fuzz_conversation);
 
     /* Initialize defaults and parse LDIF-format sudoers. */
     init_defaults();