diff --git a/library/src/radio/rf24/radio.rs b/library/src/radio/rf24/radio.rs
index e01f86a..4a481f3 100644
--- a/library/src/radio/rf24/radio.rs
+++ b/library/src/radio/rf24/radio.rs
@@ -536,6 +536,7 @@ mod test {
         let pin_expectations = [
             PinTransaction::set(PinState::Low),
             PinTransaction::set(PinState::High),
+            PinTransaction::set(PinState::Low),
         ];
         let mut pin_mock = PinMock::new(&pin_expectations);
 
@@ -549,7 +550,7 @@ mod test {
         }
 
         let spi_expectations = spi_test_expects![
-            // flush_tx() of artifact ACK payloads
+            // flush_tx()
             (vec![commands::FLUSH_TX], vec![0xEu8]),
             // clear_status_flags()
             (
@@ -563,11 +564,25 @@ mod test {
             (buf.to_vec(), vec![0u8; 33]),
             // spoof a tx_ds event from a NOP write
             (vec![commands::NOP], vec![0xE | mnemonics::MASK_TX_DS]),
+            // flush_tx()
+            (vec![commands::FLUSH_TX], vec![0xEu8]),
+            // clear_status_flags()
+            (
+                vec![
+                    registers::STATUS | commands::W_REGISTER,
+                    mnemonics::MASK_MAX_RT | mnemonics::MASK_RX_DR | mnemonics::MASK_TX_DS,
+                ],
+                vec![0xFu8, 0u8],
+            ),
         ];
         let mut spi_mock = SpiMock::new(&spi_expectations);
         let mut radio = RF24::new(pin_mock.clone(), spi_mock.clone(), delay_mock);
         let payload = [0x55; 8];
         assert!(radio.send(&payload, false).unwrap());
+        // again using simulated full TX FIFO
+        assert!(!radio.send(&payload, false).unwrap());
+        radio._config_reg |= 1; // simulate RX mode
+        assert!(!radio.send(&payload, false).unwrap());
         spi_mock.done();
         pin_mock.done();
     }
@@ -651,6 +666,8 @@ mod test {
         let mut spi_mock = SpiMock::new(&spi_expectations);
         let mut radio = RF24::new(pin_mock.clone(), spi_mock.clone(), delay_mock);
         assert!(radio.resend().unwrap());
+        radio._config_reg |= 1; // simulate RX mode
+        assert!(!radio.resend().unwrap());
         spi_mock.done();
         pin_mock.done();
     }
diff --git a/library/src/types.rs b/library/src/types.rs
index 8cc51e9..3177fb7 100644
--- a/library/src/types.rs
+++ b/library/src/types.rs
@@ -187,3 +187,107 @@ impl Display for StatusFlags {
         )
     }
 }
+
+#[cfg(test)]
+mod test {
+    use crate::StatusFlags;
+
+    use super::{CrcLength, DataRate, FifoState, PaLevel};
+    extern crate std;
+    use std::{format, string::String};
+
+    fn display_crc(param: CrcLength, expected: String) -> bool {
+        format!("{param}") == expected
+    }
+
+    #[test]
+    fn crc_8bit() {
+        assert!(display_crc(CrcLength::Bit8, String::from("8 bit")));
+    }
+
+    #[test]
+    fn crc_16bit() {
+        assert!(display_crc(CrcLength::Bit16, String::from("16 bit")));
+    }
+
+    #[test]
+    fn crc_disable() {
+        assert!(display_crc(CrcLength::Disabled, String::from("disabled")));
+    }
+
+    fn display_fifo_state(param: FifoState, expected: String) -> bool {
+        format!("{param}") == expected
+    }
+
+    #[test]
+    fn fifo_state_empty() {
+        assert!(display_fifo_state(FifoState::Empty, String::from("Empty")));
+    }
+
+    #[test]
+    fn fifo_state_full() {
+        assert!(display_fifo_state(FifoState::Full, String::from("Full")));
+    }
+
+    #[test]
+    fn fifo_state_occupied() {
+        assert!(display_fifo_state(
+            FifoState::Occupied,
+            String::from("Occupied")
+        ));
+    }
+
+    fn display_data_rate(param: DataRate, expected: String) -> bool {
+        format!("{param}") == expected
+    }
+
+    #[test]
+    fn data_rate_1mbps() {
+        assert!(display_data_rate(DataRate::Mbps1, String::from("1 Mbps")));
+    }
+
+    #[test]
+    fn data_rate_2mbps() {
+        assert!(display_data_rate(DataRate::Mbps2, String::from("2 Mbps")));
+    }
+
+    #[test]
+    fn data_rate_250kbps() {
+        assert!(display_data_rate(
+            DataRate::Kbps250,
+            String::from("250 Kbps")
+        ));
+    }
+
+    fn display_pa_level(param: PaLevel, expected: String) -> bool {
+        format!("{param}") == expected
+    }
+
+    #[test]
+    fn pa_level_min() {
+        assert!(display_pa_level(PaLevel::Min, String::from("Min")));
+    }
+
+    #[test]
+    fn pa_level_low() {
+        assert!(display_pa_level(PaLevel::Low, String::from("Low")));
+    }
+
+    #[test]
+    fn pa_level_high() {
+        assert!(display_pa_level(PaLevel::High, String::from("High")));
+    }
+
+    #[test]
+    fn pa_level_max() {
+        assert!(display_pa_level(PaLevel::Max, String::from("Max")));
+    }
+
+    #[test]
+    fn display_flags() {
+        assert_eq!(
+            format!("{}", StatusFlags::default()),
+            String::from("StatusFlags rx_dr: false, tx_ds: false, tx_df: false")
+        );
+    }
+}