diff --git a/esphome/components/tm1637/tm1637.cpp b/esphome/components/tm1637/tm1637.cpp
index f9c876f40c..da9adb59a4 100644
--- a/esphome/components/tm1637/tm1637.cpp
+++ b/esphome/components/tm1637/tm1637.cpp
@@ -348,6 +348,12 @@ uint8_t TM1637Display::print(uint8_t start_pos, const char *str) {
   return pos - start_pos;
 }
 uint8_t TM1637Display::print(const char *str) { return this->print(0, str); }
+
+void TM1637Display::set_buffer(const uint8_t *data, uint8_t length) {
+  uint8_t len = std::min(length, (uint8_t) sizeof(this->buffer_));
+  memcpy(this->buffer_, data, len);
+}
+
 uint8_t TM1637Display::printf(uint8_t pos, const char *format, ...) {
   va_list arg;
   va_start(arg, format);
diff --git a/esphome/components/tm1637/tm1637.h b/esphome/components/tm1637/tm1637.h
index b9e96119e9..c1fbabb21b 100644
--- a/esphome/components/tm1637/tm1637.h
+++ b/esphome/components/tm1637/tm1637.h
@@ -47,6 +47,9 @@ class TM1637Display : public PollingComponent {
   /// Print `str` at position 0.
   uint8_t print(const char *str);
 
+  /// Set raw buffer bytes from data array up to length bytes.
+  void set_buffer(const uint8_t *data, uint8_t length);
+
   void set_intensity(uint8_t intensity) { this->intensity_ = intensity; }
   void set_inverted(bool inverted) { this->inverted_ = inverted; }
   void set_length(uint8_t length) { this->length_ = length; }
diff --git a/tests/components/tm1637/common.yaml b/tests/components/tm1637/common.yaml
index 8d01e29877..b6debc055d 100644
--- a/tests/components/tm1637/common.yaml
+++ b/tests/components/tm1637/common.yaml
@@ -5,3 +5,5 @@ display:
     intensity: 3
     lambda: |-
       it.print("1234");
+      static const uint8_t buf[] = {0x3f, 0x06, 0x5b, 0x4f | 0x80};
+      it.set_buffer(buf, sizeof(buf));
diff --git a/tests/unit_tests/test_cpp_helpers.py b/tests/unit_tests/test_cpp_helpers.py
index efb3ca5e07..52424a7cb2 100644
--- a/tests/unit_tests/test_cpp_helpers.py
+++ b/tests/unit_tests/test_cpp_helpers.py
@@ -82,12 +82,14 @@ async def test_register_component__with_setup_priority(monkeypatch):
     assert core_mock.component_ids == []
 
 
-def test_register_component_source_empty_name(monkeypatch):
+def test_register_component_source_empty_name(monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setattr(ch, "CORE", Mock(data={}))
     assert register_component_source("") == 0
 
 
-def test_register_component_source_deduplicates(monkeypatch):
+def test_register_component_source_deduplicates(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
     monkeypatch.setattr(ch, "CORE", Mock(data={}))
     idx1 = register_component_source("wifi")
     idx2 = register_component_source("api")
@@ -97,13 +99,42 @@ def test_register_component_source_deduplicates(monkeypatch):
     assert idx3 == 1  # deduplicated
 
 
-def test_generate_source_table_code_empty():
+def test_generate_source_table_code_empty() -> None:
     from esphome.cpp_helpers import _generate_source_table_code
 
     assert _generate_source_table_code("TBL", "lookup", {}) == ""
 
 
-def test_register_component_source_overflow_warns(monkeypatch, caplog):
+def test_generate_source_table_code_non_empty() -> None:
+    from esphome.cpp_helpers import _generate_source_table_code
+
+    code = _generate_source_table_code("TBL", "lookup", {"wifi": 1, "api": 2})
+    assert "PROGMEM" in code
+    assert "wifi" in code
+    assert "api" in code
+    assert "lookup" in code
+    assert "index == 0" in code
+    assert "progmem_read_ptr" in code
+    assert "index > 2" in code
+
+
+@pytest.mark.asyncio
+async def test_generate_component_source_table_empty_pool(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Test that _generate_component_source_table does nothing with an empty pool."""
+    from esphome.cpp_helpers import _generate_component_source_table
+
+    monkeypatch.setattr(ch, "CORE", Mock(data={}))
+    add_global_mock = Mock()
+    monkeypatch.setattr(ch, "add_global", add_global_mock)
+    await _generate_component_source_table()
+    add_global_mock.assert_not_called()
+
+
+def test_register_component_source_overflow_warns(
+    monkeypatch: pytest.MonkeyPatch, caplog: pytest.LogCaptureFixture
+) -> None:
     # Pre-fill pool to max
     pool = ComponentSourcePool(
         sources={f"comp_{i}": i + 1 for i in range(0xFF)},