diff --git a/include/jemalloc/internal/base.h b/include/jemalloc/internal/base.h
index f71a874c..5200e4ff 100644
--- a/include/jemalloc/internal/base.h
+++ b/include/jemalloc/internal/base.h
@@ -106,7 +106,6 @@ base_t *base_new(tsdn_t *tsdn, unsigned ind, const extent_hooks_t *extent_hooks,
     bool metadata_use_hooks);
 void    base_delete(tsdn_t *tsdn, base_t *base);
 ehooks_t       *base_ehooks_get(base_t *base);
-ehooks_t       *base_ehooks_get_for_metadata(base_t *base);
 extent_hooks_t *base_extent_hooks_set(
     base_t *base, extent_hooks_t *extent_hooks);
 void    *base_alloc(tsdn_t *tsdn, base_t *base, size_t size, size_t alignment);
diff --git a/include/jemalloc/internal/bin.h b/include/jemalloc/internal/bin.h
index 90fc3d31..a4fb1402 100644
--- a/include/jemalloc/internal/bin.h
+++ b/include/jemalloc/internal/bin.h
@@ -69,23 +69,13 @@ void bin_postfork_parent(tsdn_t *tsdn, bin_t *bin);
 void bin_postfork_child(tsdn_t *tsdn, bin_t *bin);
 
 /* Slab region allocation. */
-void *bin_slab_reg_alloc(edata_t *slab, const bin_info_t *bin_info);
 void  bin_slab_reg_alloc_batch(
      edata_t *slab, const bin_info_t *bin_info, unsigned cnt, void **ptrs);
 
 /* Slab list management. */
-void     bin_slabs_nonfull_insert(bin_t *bin, edata_t *slab);
-void     bin_slabs_nonfull_remove(bin_t *bin, edata_t *slab);
-edata_t *bin_slabs_nonfull_tryget(bin_t *bin);
-void     bin_slabs_full_insert(bool is_auto, bin_t *bin, edata_t *slab);
 void     bin_slabs_full_remove(bool is_auto, bin_t *bin, edata_t *slab);
 
-/* Slab association / demotion. */
-void bin_dissociate_slab(bool is_auto, edata_t *slab, bin_t *bin);
-void bin_lower_slab(tsdn_t *tsdn, bool is_auto, edata_t *slab, bin_t *bin);
-
 /* Deallocation helpers (called under bin lock). */
-void bin_dalloc_slab_prepare(tsdn_t *tsdn, edata_t *slab, bin_t *bin);
 void bin_dalloc_locked_handle_newly_empty(
     tsdn_t *tsdn, bool is_auto, edata_t *slab, bin_t *bin);
 void bin_dalloc_locked_handle_newly_nonempty(
diff --git a/include/jemalloc/internal/bitmap.h b/include/jemalloc/internal/bitmap.h
index 18c96f41..2b83f077 100644
--- a/include/jemalloc/internal/bitmap.h
+++ b/include/jemalloc/internal/bitmap.h
@@ -176,9 +176,7 @@ typedef struct bitmap_info_s {
 #endif /* BITMAP_USE_TREE */
 } bitmap_info_t;
 
-void   bitmap_info_init(bitmap_info_t *binfo, size_t nbits);
 void   bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo, bool fill);
-size_t bitmap_size(const bitmap_info_t *binfo);
 
 static inline bool
 bitmap_full(const bitmap_t *bitmap, const bitmap_info_t *binfo) {
diff --git a/include/jemalloc/internal/buf_writer.h b/include/jemalloc/internal/buf_writer.h
index 5ee9af4e..ec0be7a9 100644
--- a/include/jemalloc/internal/buf_writer.h
+++ b/include/jemalloc/internal/buf_writer.h
@@ -25,7 +25,6 @@ typedef struct {
 
 bool       buf_writer_init(tsdn_t *tsdn, buf_writer_t *buf_writer,
           write_cb_t *write_cb, void *cbopaque, char *buf, size_t buf_len);
-void       buf_writer_flush(buf_writer_t *buf_writer);
 write_cb_t buf_writer_cb;
 void       buf_writer_terminate(tsdn_t *tsdn, buf_writer_t *buf_writer);
 
diff --git a/include/jemalloc/internal/ckh.h b/include/jemalloc/internal/ckh.h
index 01b27e8f..14ef244e 100644
--- a/include/jemalloc/internal/ckh.h
+++ b/include/jemalloc/internal/ckh.h
@@ -93,10 +93,4 @@ bool ckh_remove(
     tsd_t *tsd, ckh_t *ckh, const void *searchkey, void **key, void **data);
 bool ckh_search(ckh_t *ckh, const void *searchkey, void **key, void **data);
 
-/* Some useful hash and comparison functions for strings and pointers. */
-void ckh_string_hash(const void *key, size_t r_hash[2]);
-bool ckh_string_keycomp(const void *k1, const void *k2);
-void ckh_pointer_hash(const void *key, size_t r_hash[2]);
-bool ckh_pointer_keycomp(const void *k1, const void *k2);
-
 #endif /* JEMALLOC_INTERNAL_CKH_H */
diff --git a/include/jemalloc/internal/hpa.h b/include/jemalloc/internal/hpa.h
index c5fcf47b..b7d685d9 100644
--- a/include/jemalloc/internal/hpa.h
+++ b/include/jemalloc/internal/hpa.h
@@ -190,7 +190,6 @@ struct hpa_shard_s {
 	nstime_t last_time_work_attempted;
 };
 
-bool hpa_hugepage_size_exceeds_limit(void);
 /*
  * Whether or not the HPA can be used given the current configuration.  This
  * is not necessarily a guarantee that it backs its allocations by hugepages,
diff --git a/include/jemalloc/internal/hpdata.h b/include/jemalloc/internal/hpdata.h
index b99810cf..a13aa106 100644
--- a/include/jemalloc/internal/hpdata.h
+++ b/include/jemalloc/internal/hpdata.h
@@ -425,11 +425,6 @@ hpdata_full(const hpdata_t *hpdata) {
 
 void hpdata_init(hpdata_t *hpdata, void *addr, uint64_t age, bool is_huge);
 
-/*
- * Given an hpdata which can serve an allocation request, pick and reserve an
- * offset within that allocation.
- */
-void *hpdata_reserve_alloc(hpdata_t *hpdata, size_t sz);
 void  hpdata_unreserve(hpdata_t *hpdata, void *addr, size_t sz);
 
 /*
diff --git a/include/jemalloc/internal/nstime.h b/include/jemalloc/internal/nstime.h
index 5cfe65eb..b7342210 100644
--- a/include/jemalloc/internal/nstime.h
+++ b/include/jemalloc/internal/nstime.h
@@ -28,7 +28,6 @@ static const nstime_t nstime_zero = NSTIME_ZERO_INITIALIZER;
 void     nstime_init(nstime_t *time, uint64_t ns);
 void     nstime_init2(nstime_t *time, uint64_t sec, uint64_t nsec);
 uint64_t nstime_ns(const nstime_t *time);
-uint64_t nstime_ms(const nstime_t *time);
 uint64_t nstime_sec(const nstime_t *time);
 uint64_t nstime_nsec(const nstime_t *time);
 void     nstime_copy(nstime_t *time, const nstime_t *source);
@@ -36,7 +35,6 @@ int      nstime_compare(const nstime_t *a, const nstime_t *b);
 void     nstime_add(nstime_t *time, const nstime_t *addend);
 void     nstime_iadd(nstime_t *time, uint64_t addend);
 void     nstime_subtract(nstime_t *time, const nstime_t *subtrahend);
-void     nstime_isubtract(nstime_t *time, uint64_t subtrahend);
 void     nstime_imultiply(nstime_t *time, uint64_t multiplier);
 void     nstime_idivide(nstime_t *time, uint64_t divisor);
 uint64_t nstime_divide(const nstime_t *time, const nstime_t *divisor);
diff --git a/include/jemalloc/internal/prof.h b/include/jemalloc/internal/prof.h
index b0757886..e04836ce 100644
--- a/include/jemalloc/internal/prof.h
+++ b/include/jemalloc/internal/prof.h
@@ -419,7 +419,6 @@ void        prof_prefork1(tsdn_t *tsdn);
 void        prof_postfork_parent(tsdn_t *tsdn);
 void        prof_postfork_child(tsdn_t *tsdn);
 
-uint64_t prof_sample_new_event_wait(tsd_t *tsd);
 uint64_t tsd_prof_sample_event_wait_get(tsd_t *tsd);
 
 extern te_base_cb_t prof_sample_te_handler;
diff --git a/include/jemalloc/internal/prof_data.h b/include/jemalloc/internal/prof_data.h
index 0af5835c..1c3f9897 100644
--- a/include/jemalloc/internal/prof_data.h
+++ b/include/jemalloc/internal/prof_data.h
@@ -29,9 +29,4 @@ void          prof_tdata_detach(tsd_t *tsd, prof_tdata_t *tdata);
 void          prof_reset(tsd_t *tsd, size_t lg_sample);
 void          prof_tctx_try_destroy(tsd_t *tsd, prof_tctx_t *tctx);
 
-/* Used in unit tests. */
-size_t prof_tdata_count(void);
-size_t prof_bt_count(void);
-void   prof_cnt_all(prof_cnt_t *cnt_all);
-
 #endif /* JEMALLOC_INTERNAL_PROF_DATA_H */
diff --git a/include/jemalloc/internal/prof_log.h b/include/jemalloc/internal/prof_log.h
index d9b97dc8..3a38e886 100644
--- a/include/jemalloc/internal/prof_log.h
+++ b/include/jemalloc/internal/prof_log.h
@@ -9,14 +9,6 @@ extern malloc_mutex_t log_mtx;
 void prof_try_log(tsd_t *tsd, size_t usize, prof_info_t *prof_info);
 bool prof_log_init(tsd_t *tsdn);
 
-/* Used in unit tests. */
-size_t prof_log_bt_count(void);
-size_t prof_log_alloc_count(void);
-size_t prof_log_thr_count(void);
-bool   prof_log_is_logging(void);
-bool   prof_log_rep_check(void);
-void   prof_log_dummy_set(bool new_value);
-
 bool prof_log_start(tsdn_t *tsdn, const char *filename);
 bool prof_log_stop(tsdn_t *tsdn);
 
diff --git a/include/jemalloc/internal/prof_recent.h b/include/jemalloc/internal/prof_recent.h
index 33649e6d..2627f43b 100644
--- a/include/jemalloc/internal/prof_recent.h
+++ b/include/jemalloc/internal/prof_recent.h
@@ -17,8 +17,6 @@ void edata_prof_recent_alloc_init(edata_t *edata);
 /* Used in unit tests. */
 typedef ql_head(prof_recent_t) prof_recent_list_t;
 extern prof_recent_list_t prof_recent_alloc_list;
-edata_t *prof_recent_alloc_edata_get_no_lock_test(const prof_recent_t *node);
-prof_recent_t *edata_prof_recent_alloc_get_no_lock_test(const edata_t *edata);
 
 ssize_t prof_recent_alloc_max_ctl_read(void);
 ssize_t prof_recent_alloc_max_ctl_write(tsd_t *tsd, ssize_t max);
diff --git a/include/jemalloc/internal/sc.h b/include/jemalloc/internal/sc.h
index 7d2ff271..1fd077e2 100644
--- a/include/jemalloc/internal/sc.h
+++ b/include/jemalloc/internal/sc.h
@@ -368,7 +368,6 @@ struct sc_data_s {
 	sc_t sc[SC_NSIZES];
 };
 
-size_t reg_size_compute(int lg_base, int lg_delta, int ndelta);
 void   sc_data_init(sc_data_t *data);
 /*
  * Updates slab sizes in [begin, end] to be pgs pages in length, if possible.
diff --git a/src/base.c b/src/base.c
index 0ac658b7..3a76050f 100644
--- a/src/base.c
+++ b/src/base.c
@@ -8,6 +8,8 @@
 #include "jemalloc/internal/mutex.h"
 #include "jemalloc/internal/sz.h"
 
+JET_EXTERN ehooks_t *base_ehooks_get_for_metadata(base_t *base);
+
 /*
  * In auto mode, arenas switch to huge pages for the base allocator on the
  * second base block.  a0 switches to thp on the 5th block (after 20 megabytes
@@ -545,7 +547,7 @@ base_ehooks_get(base_t *base) {
 	return &base->ehooks;
 }
 
-ehooks_t *
+JET_EXTERN ehooks_t *
 base_ehooks_get_for_metadata(base_t *base) {
 	return &base->ehooks_base;
 }
diff --git a/src/bin.c b/src/bin.c
index 694579b9..830483a2 100644
--- a/src/bin.c
+++ b/src/bin.c
@@ -69,7 +69,7 @@ bin_postfork_child(tsdn_t *tsdn, bin_t *bin) {
 	malloc_mutex_postfork_child(tsdn, &bin->lock);
 }
 
-void *
+JET_EXTERN void *
 bin_slab_reg_alloc(edata_t *slab, const bin_info_t *bin_info) {
 	void        *ret;
 	slab_data_t *slab_data = edata_slab_data_get(slab);
@@ -134,7 +134,7 @@ bin_slab_reg_alloc_batch(
 	edata_nfree_sub(slab, cnt);
 }
 
-void
+JET_EXTERN void
 bin_slabs_nonfull_insert(bin_t *bin, edata_t *slab) {
 	assert(edata_nfree_get(slab) > 0);
 	edata_heap_insert(&bin->slabs_nonfull, slab);
@@ -143,7 +143,7 @@ bin_slabs_nonfull_insert(bin_t *bin, edata_t *slab) {
 	}
 }
 
-void
+JET_EXTERN void
 bin_slabs_nonfull_remove(bin_t *bin, edata_t *slab) {
 	edata_heap_remove(&bin->slabs_nonfull, slab);
 	if (config_stats) {
@@ -151,7 +151,7 @@ bin_slabs_nonfull_remove(bin_t *bin, edata_t *slab) {
 	}
 }
 
-edata_t *
+JET_EXTERN edata_t *
 bin_slabs_nonfull_tryget(bin_t *bin) {
 	edata_t *slab = edata_heap_remove_first(&bin->slabs_nonfull);
 	if (slab == NULL) {
@@ -164,7 +164,7 @@ bin_slabs_nonfull_tryget(bin_t *bin) {
 	return slab;
 }
 
-void
+JET_EXTERN void
 bin_slabs_full_insert(bool is_auto, bin_t *bin, edata_t *slab) {
 	assert(edata_nfree_get(slab) == 0);
 	/*
@@ -186,7 +186,7 @@ bin_slabs_full_remove(bool is_auto, bin_t *bin, edata_t *slab) {
 	edata_list_active_remove(&bin->slabs_full, slab);
 }
 
-void
+JET_EXTERN void
 bin_dissociate_slab(bool is_auto, edata_t *slab, bin_t *bin) {
 	/* Dissociate slab from bin. */
 	if (slab == bin->slabcur) {
@@ -208,7 +208,7 @@ bin_dissociate_slab(bool is_auto, edata_t *slab, bin_t *bin) {
 	}
 }
 
-void
+JET_EXTERN void
 bin_lower_slab(tsdn_t *tsdn, bool is_auto, edata_t *slab, bin_t *bin) {
 	assert(edata_nfree_get(slab) > 0);
 
@@ -234,7 +234,7 @@ bin_lower_slab(tsdn_t *tsdn, bool is_auto, edata_t *slab, bin_t *bin) {
 	}
 }
 
-void
+JET_EXTERN void
 bin_dalloc_slab_prepare(tsdn_t *tsdn, edata_t *slab, bin_t *bin) {
 	malloc_mutex_assert_owner(tsdn, &bin->lock);
 
diff --git a/src/bitmap.c b/src/bitmap.c
index c399a05c..2f113ad7 100644
--- a/src/bitmap.c
+++ b/src/bitmap.c
@@ -5,8 +5,11 @@
 
 /******************************************************************************/
 
+JET_EXTERN size_t bitmap_size(const bitmap_info_t *binfo);
+
 #ifdef BITMAP_USE_TREE
 
+#ifdef JEMALLOC_JET
 void
 bitmap_info_init(bitmap_info_t *binfo, size_t nbits) {
 	unsigned i;
@@ -34,6 +37,7 @@ bitmap_info_init(bitmap_info_t *binfo, size_t nbits) {
 	binfo->nlevels = i;
 	binfo->nbits = nbits;
 }
+#endif
 
 static size_t
 bitmap_info_ngroups(const bitmap_info_t *binfo) {
@@ -82,6 +86,7 @@ bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo, bool fill) {
 
 #else /* BITMAP_USE_TREE */
 
+#ifdef JEMALLOC_JET
 void
 bitmap_info_init(bitmap_info_t *binfo, size_t nbits) {
 	assert(nbits > 0);
@@ -90,6 +95,7 @@ bitmap_info_init(bitmap_info_t *binfo, size_t nbits) {
 	binfo->ngroups = BITMAP_BITS2GROUPS(nbits);
 	binfo->nbits = nbits;
 }
+#endif
 
 static size_t
 bitmap_info_ngroups(const bitmap_info_t *binfo) {
@@ -115,7 +121,7 @@ bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo, bool fill) {
 
 #endif /* BITMAP_USE_TREE */
 
-size_t
+JET_EXTERN size_t
 bitmap_size(const bitmap_info_t *binfo) {
 	return (bitmap_info_ngroups(binfo) << LG_SIZEOF_BITMAP);
 }
diff --git a/src/buf_writer.c b/src/buf_writer.c
index 48b94100..ede9f53e 100644
--- a/src/buf_writer.c
+++ b/src/buf_writer.c
@@ -68,7 +68,7 @@ buf_writer_init(tsdn_t *tsdn, buf_writer_t *buf_writer, write_cb_t *write_cb,
 	return buf_writer->buf == NULL;
 }
 
-void
+JET_EXTERN void
 buf_writer_flush(buf_writer_t *buf_writer) {
 	buf_writer_assert(buf_writer);
 	if (buf_writer->buf == NULL) {
diff --git a/src/ckh.c b/src/ckh.c
index 4c61c060..29d71218 100644
--- a/src/ckh.c
+++ b/src/ckh.c
@@ -541,6 +541,7 @@ ckh_search(ckh_t *ckh, const void *searchkey, void **key, void **data) {
 	return true;
 }
 
+#ifdef JEMALLOC_JET
 void
 ckh_string_hash(const void *key, size_t r_hash[2]) {
 	hash(key, strlen((const char *)key), 0x94122f33U, r_hash);
@@ -570,3 +571,4 @@ bool
 ckh_pointer_keycomp(const void *k1, const void *k2) {
 	return (k1 == k2);
 }
+#endif
diff --git a/src/hpa.c b/src/hpa.c
index c7fb0c31..5140a701 100644
--- a/src/hpa.c
+++ b/src/hpa.c
@@ -14,7 +14,7 @@ const char *const hpa_hugify_style_names[] = {"auto", "none", "eager", "lazy"};
 bool opt_experimental_hpa_start_huge_if_thp_always = true;
 bool opt_experimental_hpa_enforce_hugify = false;
 
-bool
+JET_EXTERN bool
 hpa_hugepage_size_exceeds_limit(void) {
 	return HUGEPAGE > HUGEPAGE_MAX_EXPECTED_SIZE;
 }
diff --git a/src/hpdata.c b/src/hpdata.c
index 1da4ffa0..0360c52a 100644
--- a/src/hpdata.c
+++ b/src/hpdata.c
@@ -46,6 +46,7 @@ ph_gen(, hpdata_age_heap, hpdata_t, age_link, hpdata_age_comp)
 	hpdata_assert_consistent(hpdata);
 }
 
+#ifdef JEMALLOC_JET
 void *
 hpdata_reserve_alloc(hpdata_t *hpdata, size_t sz) {
 	hpdata_assert_consistent(hpdata);
@@ -138,6 +139,7 @@ hpdata_reserve_alloc(hpdata_t *hpdata, size_t sz) {
 	return (
 	    void *)((byte_t *)hpdata_addr_get(hpdata) + (result << LG_PAGE));
 }
+#endif
 
 void
 hpdata_unreserve(hpdata_t *hpdata, void *addr, size_t sz) {
diff --git a/src/nstime.c b/src/nstime.c
index 3b4810db..585cbfaa 100644
--- a/src/nstime.c
+++ b/src/nstime.c
@@ -60,11 +60,13 @@ nstime_ns(const nstime_t *time) {
 	return time->ns;
 }
 
+#ifdef JEMALLOC_JET
 uint64_t
 nstime_ms(const nstime_t *time) {
 	nstime_assert_initialized(time);
 	return time->ns / MILLION;
 }
+#endif
 
 uint64_t
 nstime_sec(const nstime_t *time) {
@@ -119,6 +121,7 @@ nstime_subtract(nstime_t *time, const nstime_t *subtrahend) {
 	time->ns -= subtrahend->ns;
 }
 
+#ifdef JEMALLOC_JET
 void
 nstime_isubtract(nstime_t *time, uint64_t subtrahend) {
 	nstime_assert_initialized(time);
@@ -127,6 +130,7 @@ nstime_isubtract(nstime_t *time, uint64_t subtrahend) {
 	/* No initialize operand -- subtraction must be initialized. */
 	time->ns -= subtrahend;
 }
+#endif
 
 void
 nstime_imultiply(nstime_t *time, uint64_t multiplier) {
diff --git a/src/prof.c b/src/prof.c
index 0768c0ba..b1e69fd3 100644
--- a/src/prof.c
+++ b/src/prof.c
@@ -249,7 +249,7 @@ prof_tctx_create(tsd_t *tsd) {
  * (e.g.
  * -mno-sse) in order for the workaround to be complete.
  */
-uint64_t
+JET_EXTERN uint64_t
 prof_sample_new_event_wait(tsd_t *tsd) {
 #ifdef JEMALLOC_PROF
 	if (lg_prof_sample == 0) {
diff --git a/src/prof_data.c b/src/prof_data.c
index d517081c..ab122085 100644
--- a/src/prof_data.c
+++ b/src/prof_data.c
@@ -404,6 +404,7 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt) {
 	return ret.p;
 }
 
+#ifdef JEMALLOC_JET
 /* Used in unit tests. */
 static prof_tdata_t *
 prof_tdata_count_iter(
@@ -449,6 +450,7 @@ prof_bt_count(void) {
 
 	return bt_count;
 }
+#endif
 
 static void
 prof_thread_name_write_tdata(prof_tdata_t *tdata, const char *thread_name) {
@@ -1105,6 +1107,7 @@ prof_dump_impl(tsd_t *tsd, write_cb_t *prof_dump_write, void *cbopaque,
 	}
 }
 
+#ifdef JEMALLOC_JET
 /* Used in unit tests. */
 void
 prof_cnt_all(prof_cnt_t *cnt_all) {
@@ -1119,6 +1122,7 @@ prof_cnt_all(prof_cnt_t *cnt_all) {
 		prof_gctx_finish(tsd, &gctxs);
 	}
 }
+#endif
 
 void
 prof_bt_hash(const void *key, size_t r_hash[2]) {
diff --git a/src/prof_log.c b/src/prof_log.c
index 642e87d7..d0f58da3 100644
--- a/src/prof_log.c
+++ b/src/prof_log.c
@@ -309,6 +309,7 @@ prof_thr_node_keycomp(const void *k1, const void *k2) {
 	return thr_node1->thr_uid == thr_node2->thr_uid;
 }
 
+#ifdef JEMALLOC_JET
 /* Used in unit tests. */
 size_t
 prof_log_bt_count(void) {
@@ -413,6 +414,7 @@ prof_log_dummy_set(bool new_value) {
 	cassert(config_prof);
 	prof_log_dummy = new_value;
 }
+#endif
 
 /* Used as an atexit function to stop logging on exit. */
 static void
diff --git a/src/prof_recent.c b/src/prof_recent.c
index 1b15852c..cddd9794 100644
--- a/src/prof_recent.c
+++ b/src/prof_recent.c
@@ -108,11 +108,13 @@ prof_recent_alloc_edata_get_no_lock(const prof_recent_t *n) {
 	return (edata_t *)atomic_load_p(&n->alloc_edata, ATOMIC_ACQUIRE);
 }
 
+#ifdef JEMALLOC_JET
 edata_t *
 prof_recent_alloc_edata_get_no_lock_test(const prof_recent_t *n) {
 	cassert(config_prof);
 	return prof_recent_alloc_edata_get_no_lock(n);
 }
+#endif
 
 static inline edata_t *
 prof_recent_alloc_edata_get(tsd_t *tsd, const prof_recent_t *n) {
@@ -138,11 +140,13 @@ edata_prof_recent_alloc_get_no_lock(const edata_t *edata) {
 	return edata_prof_recent_alloc_get_dont_call_directly(edata);
 }
 
+#ifdef JEMALLOC_JET
 prof_recent_t *
 edata_prof_recent_alloc_get_no_lock_test(const edata_t *edata) {
 	cassert(config_prof);
 	return edata_prof_recent_alloc_get_no_lock(edata);
 }
+#endif
 
 static inline prof_recent_t *
 edata_prof_recent_alloc_get(tsd_t *tsd, const edata_t *edata) {
diff --git a/src/sc.c b/src/sc.c
index 014ab95d..0c4d445e 100644
--- a/src/sc.c
+++ b/src/sc.c
@@ -13,7 +13,7 @@
  * at least the damage is compartmentalized to this file.
  */
 
-size_t
+JET_EXTERN size_t
 reg_size_compute(int lg_base, int lg_delta, int ndelta) {
 	return (ZU(1) << lg_base) + (ZU(ndelta) << lg_delta);
 }
diff --git a/test/analyze/rand.c b/test/analyze/rand.c
index 4c7e18c7..202c25e1 100644
--- a/test/analyze/rand.c
+++ b/test/analyze/rand.c
@@ -1,5 +1,7 @@
 #include "test/jemalloc_test.h"
 
+extern uint64_t prof_sample_new_event_wait(tsd_t *tsd);
+
 /******************************************************************************/
 
 /*
diff --git a/test/include/test/hpa.h b/test/include/test/hpa.h
new file mode 100644
index 00000000..01cd7237
--- /dev/null
+++ b/test/include/test/hpa.h
@@ -0,0 +1,10 @@
+#ifndef TEST_HPA_H
+#define TEST_HPA_H
+
+/*
+ * Static in production builds (JET_EXTERN); exported only for the unit tests
+ * that share it (hpa_central, psset).
+ */
+extern bool hpa_hugepage_size_exceeds_limit(void);
+
+#endif /* TEST_HPA_H */
diff --git a/test/include/test/hpdata.h b/test/include/test/hpdata.h
new file mode 100644
index 00000000..1f13b82e
--- /dev/null
+++ b/test/include/test/hpdata.h
@@ -0,0 +1,10 @@
+#ifndef TEST_HPDATA_H
+#define TEST_HPDATA_H
+
+/*
+ * Static in production builds (JET_EXTERN); exported only for the unit tests
+ * that share it (hpdata, psset).
+ */
+extern void *hpdata_reserve_alloc(hpdata_t *hpdata, size_t sz);
+
+#endif /* TEST_HPDATA_H */
diff --git a/test/include/test/prof_data.h b/test/include/test/prof_data.h
new file mode 100644
index 00000000..f913ed71
--- /dev/null
+++ b/test/include/test/prof_data.h
@@ -0,0 +1,12 @@
+#ifndef TEST_PROF_DATA_H
+#define TEST_PROF_DATA_H
+
+/*
+ * Static in production builds (#ifdef JEMALLOC_JET); exported only for the unit
+ * tests that share them (prof_reset, prof_accum, prof_active, prof_tctx).
+ */
+extern size_t prof_tdata_count(void);
+extern size_t prof_bt_count(void);
+extern void   prof_cnt_all(prof_cnt_t *cnt_all);
+
+#endif /* TEST_PROF_DATA_H */
diff --git a/test/unit/base.c b/test/unit/base.c
index e6e82435..de5090d3 100644
--- a/test/unit/base.c
+++ b/test/unit/base.c
@@ -2,6 +2,8 @@
 
 #include "test/extent_hooks.h"
 
+extern ehooks_t *base_ehooks_get_for_metadata(base_t *base);
+
 static extent_hooks_t hooks_null = {
     extent_alloc_hook, NULL, /* dalloc */
     NULL,                    /* destroy */
diff --git a/test/unit/bin.c b/test/unit/bin.c
index a7091544..e2db1dfb 100644
--- a/test/unit/bin.c
+++ b/test/unit/bin.c
@@ -2,6 +2,15 @@
 
 extern void bin_dalloc_locked_begin(
     bin_dalloc_locked_info_t *info, szind_t binind);
+extern void *bin_slab_reg_alloc(edata_t *slab, const bin_info_t *bin_info);
+extern void bin_slabs_nonfull_insert(bin_t *bin, edata_t *slab);
+extern void bin_slabs_nonfull_remove(bin_t *bin, edata_t *slab);
+extern edata_t *bin_slabs_nonfull_tryget(bin_t *bin);
+extern void bin_slabs_full_insert(bool is_auto, bin_t *bin, edata_t *slab);
+extern void bin_dissociate_slab(bool is_auto, edata_t *slab, bin_t *bin);
+extern void bin_lower_slab(
+    tsdn_t *tsdn, bool is_auto, edata_t *slab, bin_t *bin);
+extern void bin_dalloc_slab_prepare(tsdn_t *tsdn, edata_t *slab, bin_t *bin);
 
 #define INVALID_ARENA_IND ((1U << MALLOCX_ARENA_BITS) - 1)
 
diff --git a/test/unit/bitmap.c b/test/unit/bitmap.c
index b3048cf3..7e26ee5e 100644
--- a/test/unit/bitmap.c
+++ b/test/unit/bitmap.c
@@ -2,6 +2,9 @@
 
 #include "test/nbits.h"
 
+extern void   bitmap_info_init(bitmap_info_t *binfo, size_t nbits);
+extern size_t bitmap_size(const bitmap_info_t *binfo);
+
 static void
 test_bitmap_initializer_body(const bitmap_info_t *binfo, size_t nbits) {
 	bitmap_info_t binfo_dyn;
diff --git a/test/unit/buf_writer.c b/test/unit/buf_writer.c
index 643e430c..8667919b 100644
--- a/test/unit/buf_writer.c
+++ b/test/unit/buf_writer.c
@@ -2,6 +2,8 @@
 
 #include "jemalloc/internal/buf_writer.h"
 
+extern void buf_writer_flush(buf_writer_t *buf_writer);
+
 #define TEST_BUF_SIZE 16
 #define UNIT_MAX (TEST_BUF_SIZE * 3)
 
diff --git a/test/unit/ckh.c b/test/unit/ckh.c
index f07892ac..63c8edf0 100644
--- a/test/unit/ckh.c
+++ b/test/unit/ckh.c
@@ -1,5 +1,10 @@
 #include "test/jemalloc_test.h"
 
+extern void ckh_string_hash(const void *key, size_t r_hash[2]);
+extern bool ckh_string_keycomp(const void *k1, const void *k2);
+extern void ckh_pointer_hash(const void *key, size_t r_hash[2]);
+extern bool ckh_pointer_keycomp(const void *k1, const void *k2);
+
 TEST_BEGIN(test_new_delete) {
 	tsd_t *tsd;
 	ckh_t  ckh;
diff --git a/test/unit/hpa_central.c b/test/unit/hpa_central.c
index e50bb1df..7bdd2bd8 100644
--- a/test/unit/hpa_central.c
+++ b/test/unit/hpa_central.c
@@ -1,5 +1,7 @@
 #include "test/jemalloc_test.h"
 
+#include "test/hpa.h"
+
 #include "jemalloc/internal/hpa.h"
 #include "jemalloc/internal/hpa_central.h"
 
diff --git a/test/unit/hpdata.c b/test/unit/hpdata.c
index ac45d697..407f991e 100644
--- a/test/unit/hpdata.c
+++ b/test/unit/hpdata.c
@@ -1,5 +1,7 @@
 #include "test/jemalloc_test.h"
 
+#include "test/hpdata.h"
+
 #define HPDATA_ADDR ((void *)(10 * HUGEPAGE))
 #define HPDATA_AGE 123
 
diff --git a/test/unit/nstime.c b/test/unit/nstime.c
index 8c095d09..efd27ac5 100644
--- a/test/unit/nstime.c
+++ b/test/unit/nstime.c
@@ -1,5 +1,8 @@
 #include "test/jemalloc_test.h"
 
+extern uint64_t nstime_ms(const nstime_t *time);
+extern void     nstime_isubtract(nstime_t *time, uint64_t subtrahend);
+
 #define BILLION UINT64_C(1000000000)
 
 TEST_BEGIN(test_nstime_init) {
diff --git a/test/unit/prof_accum.c b/test/unit/prof_accum.c
index 940468b9..3bdee44d 100644
--- a/test/unit/prof_accum.c
+++ b/test/unit/prof_accum.c
@@ -1,5 +1,6 @@
 #include "test/jemalloc_test.h"
 
+#include "test/prof_data.h"
 #include "jemalloc/internal/prof_data.h"
 #include "jemalloc/internal/prof_sys.h"
 
diff --git a/test/unit/prof_active.c b/test/unit/prof_active.c
index fc8b150b..ee78454f 100644
--- a/test/unit/prof_active.c
+++ b/test/unit/prof_active.c
@@ -1,5 +1,6 @@
 #include "test/jemalloc_test.h"
 
+#include "test/prof_data.h"
 #include "jemalloc/internal/prof_data.h"
 
 static void
diff --git a/test/unit/prof_log.c b/test/unit/prof_log.c
index 8cfc19ff..148e71ea 100644
--- a/test/unit/prof_log.c
+++ b/test/unit/prof_log.c
@@ -1,6 +1,13 @@
 #include "test/jemalloc_test.h"
 #include "jemalloc/internal/prof_log.h"
 
+extern size_t prof_log_bt_count(void);
+extern size_t prof_log_alloc_count(void);
+extern size_t prof_log_thr_count(void);
+extern bool   prof_log_is_logging(void);
+extern bool   prof_log_rep_check(void);
+extern void   prof_log_dummy_set(bool new_value);
+
 #define N_PARAM 100
 #define N_THREADS 10
 
diff --git a/test/unit/prof_recent.c b/test/unit/prof_recent.c
index b8fd0ca8..a0a10f74 100644
--- a/test/unit/prof_recent.c
+++ b/test/unit/prof_recent.c
@@ -2,6 +2,11 @@
 
 #include "jemalloc/internal/prof_recent.h"
 
+extern edata_t *prof_recent_alloc_edata_get_no_lock_test(
+    const prof_recent_t *node);
+extern prof_recent_t *edata_prof_recent_alloc_get_no_lock_test(
+    const edata_t *edata);
+
 /* As specified in the shell script */
 #define OPT_ALLOC_MAX 3
 
diff --git a/test/unit/prof_reset.c b/test/unit/prof_reset.c
index 0e64279e..25582752 100644
--- a/test/unit/prof_reset.c
+++ b/test/unit/prof_reset.c
@@ -1,5 +1,6 @@
 #include "test/jemalloc_test.h"
 
+#include "test/prof_data.h"
 #include "jemalloc/internal/prof_data.h"
 #include "jemalloc/internal/prof_sys.h"
 
diff --git a/test/unit/prof_tctx.c b/test/unit/prof_tctx.c
index 7fde7230..b47d1b27 100644
--- a/test/unit/prof_tctx.c
+++ b/test/unit/prof_tctx.c
@@ -1,5 +1,6 @@
 #include "test/jemalloc_test.h"
 
+#include "test/prof_data.h"
 #include "jemalloc/internal/prof_data.h"
 
 TEST_BEGIN(test_prof_realloc) {
diff --git a/test/unit/psset.c b/test/unit/psset.c
index 6ad653f5..091ddf4f 100644
--- a/test/unit/psset.c
+++ b/test/unit/psset.c
@@ -1,5 +1,8 @@
 #include "test/jemalloc_test.h"
 
+#include "test/hpa.h"
+#include "test/hpdata.h"
+
 #include "jemalloc/internal/psset.h"
 
 #define PAGESLAB_ADDR ((void *)(1234 * HUGEPAGE))
diff --git a/test/unit/sz.c b/test/unit/sz.c
index fa2b8dc0..87b5d417 100644
--- a/test/unit/sz.c
+++ b/test/unit/sz.c
@@ -1,5 +1,7 @@
 #include "test/jemalloc_test.h"
 
+extern size_t reg_size_compute(int lg_base, int lg_delta, int ndelta);
+
 TEST_BEGIN(test_sz_psz2ind) {
 	/*
 	 * Testing page size classes which reside prior to the regular group